KANT
(1724 1804)
CRITICAL
IDEALISM
Immanuel Kant
incontrovertibly was one of the West's greatest philosophers. The son of a saddler of Scottish descent,
spent his whole life in the Prussian city of Königsberg (now in Poland). After studying mathematics, theology and
philosophy he earned a living as a private tutor, but later became a lecturer
and then in 1770 Professor at the University, where he taught a wide range of
subjects. Though a confirmed bachelor he
had an eye for pretty and educated ladies. He was a man of regular habits;
it is said that the inhabitants of Königsberg could always tell the time from
his daily walks. In general his life was
uneventful and uncontroversial, though in 1794 a book on religion which he had
published brought him into conflict with the King of Prussia.
KNOWLEDGE AND METAPHYSICS
Critique of Pure Reason (1st edition 1781, 2nd edition 1787): starts
from what is unknown and deduces the presuppositions and limits of knowledge and metaphysics.
Prolegomena to any Future
Metaphysics (1783): starts from what is known
mathematics, the natural sciences and indicates, but does not 'prove' their possibility and that of a 'scientific'
metaphysics.
[Source: The edition of the Critique
of Pure Reason used is that of
Kemp Smith. 'A' refers to the first edition and 'B' to the
second edition of Kant's original text.]
KNOWLEDGE
[1] Kant argued that there are fundamental difficulties with both the
'rationalist' and 'empiricist' philosophical traditions. This can be seen by
looking at two distinctions he makes about subject-predicate judgements. A subject-predicate judgement in
'traditional' formal logic is one like 'All bachelors are male', where
'bachelor' is the subject and 'maleness' is the predicate. By a 'judgement' Kant means something that is
asserted by somebody when uttering or writing a sentence, for example, 'The
grass is green'. He considers all judgements as
"functions of unity among our representations" which involve the collecting of
immediate representations under 'higher' representations, and thus concerns the
relationship of predicates to their subjects [Critique of Pure Reason, A
69, B 94; see also sec. 9]. His first distinction [CPR, Introd. I] divides subject-predicate sentences into two
kinds according as to how we decide whether they are true or false. An a priori judgement is one whose truth or falsity can be determined
without direct reference to
experience, for example, 'All circles are round'; once we know what the
terms 'circle' and 'round' mean we can decide its truth. An a posteriori judgement, on the other hand, is
one like 'It was sunny on Friday', where its truth can be determined only by reference to the actual experience;
understanding the terms is not enough. Kant's
second distinction is between analytic judgements
and synthetic judgements [CPR, Introd. IV]. An analytic judgement is one in which the predicate is in some sense
already contained in the subject. For example, 'All bodies are extended' is analytic because the idea of
body in some way includes the idea of extension. Kant therefore calls analytic
judgements 'explicative'. A synthetic judgement, on the other hand, is one in which the
predicate is not included in the
subject, for example, 'All bodies are heavy' because the idea of body
does not have to include the idea of
heaviness. Kant calls synthetic
judgements 'ampliative'. While analytic judgements may be said to be 'necessarily' true, synthetic
judgements are not logically certain; they may be true (or false)
'contingently' [a]. Combining the two distinctions Kant now has:
1. Analytic a
priori judgements. These are clearly
possible; if they are analytic then their truth has to be known a priori; and they cannot tell us
anything about the world.
2. Analytic a
posteriori judgements. It obviously
follows from what has just been said in (1) that judgements of this kind are
not possible.
3. Synthetic a
posteriori judgements. Kant finds no
difficulty with these. If our knowledge of their truth (or falsity) depends in
some way on our experience of the world, then they cannot be analytic.
4. Synthetic a priori judgements. There is clearly a problem here. Empiricists
would say that the truth of judgements belonging to this fourth group must
depend on experience and therefore cannot be known a priori. But Kant argues
that such judgements are possible. This can be understood if we look at what he
says about the judgements
of mathematics and natural science [ CPR Introd. V].
Hume had argued that the truths of
mathematics, being analytic (to use Kant's word), can tell us nothing about the
external world. But his
empiricism can be shown to lead to scepticism; for although he was
convinced that external objects are the cause of our impressions and hence
ideas, the causal principle itself seems to be neither analytic nor derivable
from experience. Kant's suggested
solution to this problem involves showing that judgements of arithmetic, (Euclidean) geometry, and
(Newtonian) science, while not analytic, are yet necessarily true of the
empirical world to which they relate, and are thus known a priori. This
is because he believes that such
judgements relate to the co-existence and succession of finite magnitudes [b] which can be presented to the mind only
through the 'forms of intuition' of space and time [see sec. 2].
Moreover mathematics underpins the natural science though additionally this
is grounded in synthetic principles
relating to connections between things and which are prior to experience in so
far as they are derived from 'forms of the understanding' such as causality
[see sec. 2]. It is in justifying
these claims that Kant in his 'critical' philosophy is in effect setting out
the conditions under which we through our rational faculty can know objects and
thereby exhibiting the limits of metaphysics [c].
[2] Kant's theory of
knowledge is developed in the first main division of the First Critique, which
he calls the Transcendental Doctrine of the Elements. The first part is the Transcendental
Aesthetic [B 33-73]. As against both the
rationalists and the empiricists, Kant thinks a sharp distinction must be made between sensations and
'ideas' or perceptions. He therefore
identifies two faculties, (passive) sensibility and (active) understanding (Verstand) an aspect of the faculty of reason (Vernunft) [B 327]. Kant's terminology is unfortunately sometimes
ambiguous. But in general he argues that
sensibility is the capacity to receive 'representations' of external objects. (He uses 'representations', Vorstellungen in a wide sense to include all mental contents or cognitive states [a] perceptions, 'representations of
representations' as judgements [see sec. 1], images, and so on). This is effected by means of two 'forms of intuition' (Anschauungen), space and time, which in some sense
belong to our perceptual apparatus (time relating to the 'inner sensiility',
space to the 'outer'). A form may
perhaps be thought of loosely as a kind of built-in filter or lens through
which sensory data must pass. Sensations (Empfindungen), or
'sensuous empirical intuitions' (Anschauungen)
constitute the 'matter' of appearances (Erscheinungen);
space and time contribute the 'form' to those appearances. The faculty of sensibility, although passive,
thus in effect takes our sensations of material things and arranges them in
"certain relations" to produce appearances. Space and time, for
Kant, are thus a priori and necessary
(and also themselves intuitions); and he rejects both 'absolutist' and
'relativist' accounts. He says that they
are empirically real but transcendentally ideal [b]. He means by this that although they are prior
to experience they are necessary if we are to have knowledge of objects, and
indeed they contribute to it [Transc. Aesthetic, secs I & II]. For experience and knowledge to be possible,
however, understanding is also required. As he says, "thoughts without content are empty, intuitions without
concepts are blind" [B 75]. The
understanding, by means of its capacity to synthesize, orders appearances under
its own forms or categories, such
as reality, existence, substance, causality, as a result of which the
appearances become phenomena. The categories are not innate ideas (which
Kant rejected) but, as it were, built into and derived from the mind's
structure and activity [B 105-6] [c].
Because of the
joint effects of the sensibility and understanding we necessarily perceive the
world in a particular way. So rather
than our having to conform to the world, the world of experience conforms to us. Kant calls
this his "Copernican Revolution" [B xvi, xxii .]. He thus dismisses both realism and 'material' idealism. 'Realism' includes the rationalism of Wolff
(following Leibniz), who supposed we might gain access to reality and truth (to ideas, be they 'innate'
or 'transcendent') though logic and the exercise of pure reason [xxxv-xxxvii]. (Plato too might well be included in this category [see B
370ff.].) Kant also
rejects empiricist philosophies, according to which knowledge of the real world
can be obtained directly by means of sense-experience. He regards Aristotle as the chief of the
empiricists, Locke being "inconsistent" [B 882]. As for the material idealists, he
distinguishes [B 274-5] 'dogmatic' idealists, such as Berkeley, who (according
to Kant) says that the existence of things outside us is impossible;
'problematic' idealists (for example, Descartes, for whom the existence of
external things is doubtful there being only one indubitable assertion,
namely, that 'I am'). And he refers [A 377] to 'sceptical' idealists (he
no doubt has Hume in mind), who say the existence of matter (and external
objects) cannot be proved. Kant's own
thesis is that what we
actually experience are phenomena, that is, external things as they appear to us under the a priori forms of intuition of space and
time and organized by the categories of the understanding; we can have no
knowledge of external objects in
themselves (noumena), nor of
anything which transcends the limits of experience, in particular God, freedom,
and immortality (Ideas of Reason) [B xxx]. This
illegitimate 'transcendent' metaphysics is the result of attempting to push
pure reason beyond its permissible limits rather than confining it to its role
as understanding. He calls this new
philosophy Transcendental Idealism. Implicit in this philosophy is Kant's
affirmation of a clear dichotomy
between the natural and the intelligible realm [B 44, A 369] [d]. [See
further secs. 4, 6, and 10 below.]
[3] The forms of the understanding are investigated in the second part of the
Transcendental Doctrine of the Elements the Transcendental Logic [First
Division: Transcendental Analytic] Kant there examines three issues: (1) what the forms are; (2) why they are
needed for experience; (3) how they are used.
1. [Analytic of Concepts,
ch. I, B92-116.] In answer to the first
point, he says that pure forms (the categories) are basic concepts. When concepts are used by the understanding
they make up statements. The job of statements is to unify our representations. To find the basic concepts
he adopts Aristotle's classification of statements into four types: quantity,
quality, relation, modality [a]. The twelve
categories can then be listed under these headings. Thus, Unity, Plurality, and
Totality are associated with quantity; Reality and Negation are linked with
quality; Substance and
Causality [see sec. 3] with relation;
and corresponding to modality we find such categories as Possibility and
Necessity.
2.
[Analytic of Concepts, ch. 2.]. Kant's next step is to attempt a transcendental 'deduction' of the
categories [a] which will 'justify' our use of them [1st edition: A 96-130; 2nd edition: B 130-169]. In other words, he wants to show
why and how they are necessary. Suppose
I have an experience of an object: say I see a tree. Now if I am to think of
this experience both as being mine and
as a unity [A 97-103, B 150-2] (the trunk, leaves, colours, shapes,
etc. all make up one experience), then according to Kant there must be two
conditions.
Firstly, it must be possible for the "I think"
to accompany all my perceptions [B 131 ff.]. He means by this that there
has to be a sense of a unifying 'self' to hold the perceptions together in the
one experience. In Kant's
language, we have to regard the manifold as subject to "the transcendental
unity of apperception" [A 107, B 143]. This is a formal condition of experience
whereby one is able to think of one's experiences as one's own as belonging to a single consciousness. Moreover, this unity would not be possible if
such experience did not conform to the categories. However, Kant rejects 'rational psychology'. This unifying 'self' is not to be understood
as a mental substance of any kind; nor is it an empirical notion, a 'bundle of
[discrete] perceptions', for example, or everyday self-consciousness our
knowledge of which the Transcendental Unity of Apperception itself presupposes. We can have no knowledge or intuition of a
noumenal self as such though such a 'transcendental ego' seems on one
interpretation to remain as a postulate.) [See CS (3) below] [b].
Secondly, we must also suppose there is a "Transcendental
Object" (Kant calls it 'X' [A 104-6; cf. B 139] ), that is, a real thing which exists
in the world before we experience it and to which our representations can be
referred to in accordance with 'rules' [see, for example, A 108, 114,
126]. (Such rules tell us in some sense
how our representations relate to the same object and how that object
guarantees a unity between those representations.) This Transcendental Object is thus unlike the noumenon in that it is
not an empty concept but is an a priori formal concept, a presupposition
of experience, giving it unity so that it can be of an objective world. As such
it is
not itself an object of knowledge, but only the representation of appearances
under the concept of an object in general a concept which is determinable
through the manifold of those appearances. [A 251]
The concept of such an object is
itself not an empirical one; we cannot derive it from experience by any kind of
'abstraction' or 'association' of ideas [B 142]. Moreover, we are directly aware of external
objects rather than only our own ideas behind the perception of which such
objects might be supposed to exist. These objects do exist independent of our
perceptions [A 109-10, 820, B 137, 142, 276], but we know them as phenomenal
objects in space and time and not as noumena (whether understood as a limiting
concept or as unknowable things in themselves) [B 277] [see CS (3)] [c]. Kant also argues that this unity is
the same as that needed for the "I think" to accompany someone's experience,
and that both the 'subjective' and the 'objective' unity presuppose the
categories:
The original and necessary consciousness of the
identity of the self is thus at the same time a consciousness of the identity
of an equally necessary unity of the synthesis of all appearances according to
concepts, that is, according to rules, which not only make them necessarily
reproducible but also in so doing determine an object for their intuition, that
is, the concept of something wherein they are necessarily connected. [A 108;
cf.119, 126-7]
3. [Analytic of Principles,
ch. II B 176-294.] Before going on to
look at how the categories are used Kant has to deal with a problem. The
categories are a priori forms of the
understanding. How then can they apply
to sensible appearances? In the case of an empirical concept such as
'plate' there is no difficulty; the roundness of the object fits with the
concept 'circle' whether this concept be sensible or a pure geometric
one. But in the case of the categories
Kant says there has to be some third 'thing', which he calls a 'schema', to
link them to appearances. He supposes
the various schemata to be produced by relating the categories to time through
the activity of the imagination. As time
is both a priori and the form of
inner sensibility it is suitable as the means by which schemata can mediate
between the categories and the manifold. To show the ways in which the categories are applied by the
understanding Kant now [B 188 ff.] distinguishes four sets of principles corresponding again to Aristotle's four kinds of statements. The first two, which Kant says are 'constitutive',
relate to appearances and justify the application of mathematics to
experience. He calls them Axioms of Intuition [B 202 ff.]
(corresponding to the schematized categories of quantity) and the Anticipations of Perception [B 207 ff.] (quality). They enable us respectively to predict that an
intuition will be of a definite size (extension) and that it can admit of being
of a particular degree or intensity (which can vary). For example, something
may be seen or heard with varying degrees of faintness. The second two are 'regulative'. They are
'dynamical' instead of being mathematical and are concerned with the actual
existence of appearances and how they relate to each other. In the Analogies of Experience (relation) Kant tries to
show firstly [A 182-9, B 224-32] that something permanent underlies changes of appearances, and
which represents time as the permanent form of intuition. This a
priori category is substance. There can be no change in the quantity of
substance; all changes are but transformations of substance. Ordinary objects are therefore not
substances. He does however, sometimes
talk of a plurality of
substances [for example, B 462]. These might be
understood as finite 'units' of substance in general the total quantity of
this 'one' substance being fixed: but
both the nature of these substances (are they simples?) and the relation to
them of ordinary objects remains obscure [d]. [See further sec. 5 below (the Antinomies).] He then, in the
second analogy [A 189-211, B 232-56], distinguishes between a (subjective)
coexistence of appearances and an (objective) succession. We may perceive
aspects of a house in any order, but our perceptions of a moving boat are
determined by its direction, say from upstream to down. Kant's point seems to be that if we can identify an objective
succession then we have a basis for the a
priori concept of causality.
This provides unity of consciousness and gives to experience the
characteristics of objectivity. The principle of the causal relation (or the principle of sufficient
reason) in the sequence of appearances, Kant says [ B 246, 247], is valid of all objects of experience in so far
as it is itself the ground of the possibility of such experience. He is saying implicitly that the proposition 'All events must
have a cause', and hence the principle of sufficient reason, is necessary but
not analytic, and is unprovable empirically or through pure reason [B
811-12]. The third analogy also deals
with causality [A211-15, B257-62]. But here Kant is concerned with the reciprocal interactions of substances with each other [e] and not just with the causation involved
in a temporal sequence between, say, substance A and substance B. This is because he regards causal
intreraction as a requirement for substances to exist in space. Reciprocity is guaranteed by the application
of the category of community: "In our
mind, all appearances must stand in community of apperception" [B261]. The other principles in this second set are
called the Postulates of Empirical
Thought [B 265 ff.]. They may be regarded as constituting a
summary of the general conditions necessary (a) for things to exist within our
experience; (b) for them to be counted as real and as knowable, for example,
through science; and (c) for us to be able to argue from our perceptions to the
existence of unperceived things, that is, in accordance with the analogies and
other empirical or scientific rules.
Kant makes it clear that
we do therefore have direct experience of the external world. His argument is roughly this. We are conscious that we exist
in time; there must be something permanent underlying the changes of our
perceptions in time; it cannot be in us because we need the idea of
something permanent to 'fix' our own existence in time; so there must be
external objects to provide the basis for this permanence. In other words, we need the actual existence of an external world
(albeit known only as phenomenon) to help us determine our own inner states [f].
METAPHYSICS
[4] In showing how synthetic a priori knowledge is possible in
mathematics and science Kant is at the same time setting a limit as to what can
be known. His attitude towards 'traditional' metaphysics is thus
broadly negative. 'The 'dogmatic' idealism of Berkeley,
he says ['Refutation of Idealism', B 274-5], denies the existence of space and
objects as existing externally and independently of a perceiver; while
according to the 'problematic'
idealism of Descartes we can be acquainted only with our immediate
experiences and can therefore never be certain that things exist outside us,
because inference is unreliable. So Kant rejects both forms of
'idealism' in favour of his own theory. Firstly, he says that we
do have knowledge of external objects as phenomena (because he believes has shown that the experienced world of nature
conforms to the a priori forms of
intuition and understanding): but, secondly, he denies that we can have any
knowledge of the intelligible realm of noumena. Kant's
Transcendental Idealism is therefore to be regarded as 'legitimate' metaphysics [see Analytic of Principles, ch. III, A 235-60, B 294-315] [a].
In the Second Division (the Transcendental
Dialectic) of the Transcendental Logic Kant develops his attack on the old (or
'transcendent') metaphysics. He also
tries to discover the source of its errors. His main argument [B355-66] follows a distinction he makes between two
uses of the reason. In logical arguments the job of reason is
only to unify or bring together an ever-widening range of judgements as we move
from premisses to a conclusion which can then act as a new premiss for a
further argument. But pure reason may
try to go beyond what is given in experience, and to search for what Kant calls
the 'unconditioned' [B 365, 7]. This
involves an examination of 'transcendental ideas', 'idea' in this context being "a necessary concept of reason to
which no corresponding object can be given in sense-experience" [B 384]. He
says there are three kinds of unconditioned unity, corresponding to the three
categories of relation (substance, cause and reciprocity). Reason's attempt to transcend the limits of
experience can be seen in each of the three branches of traditional
metaphysics: psychology, cosmology and theology. These deal respectively with the 'Ideas of
Reason' of a substantial soul, the world as a totality, and God. Kant goes on to say that when pure reason
fails to confine itself to the a priori conditions
of experience and, during its unifying activity, tries to pass to the
unconditioned it produces fallacies and contradictions. He hopes that by identifying these he will be
able to show why transcendent metaphysics is mistaken. [See Transcendental Dialectic, Bk I, section 3.]
[5] Kant calls the fallacies associated with
the first Idea of Reason Paralogisms [T.Dial., Bk II, ch. I]. Some previous philosophers had claimed that
the soul is a substance, is simple, is a person, and that the existence of
external things is doubtful. Kant
answers these assertions as follows. (1) The soul is a substance only
in idea, because we cannot argue from a concept to an actual existing
unitary thinking substance. (2) It cannot be simple, because
this notion can apply only to an object that can be experienced. (3) The idea of personal identity is itself just a 'representation' and may be no more permanent than the
thoughts it is supposed to hold together. (4) He repeats the criticisms he made earlier about idealism [B
375]. So far from the 'I think' being
experienced, the self, as
the Transcendental Unity of Apperception, is a presupposition of all possible experience and cannot be known in
itself [a]. He goes on [A 381ff.] to consider a number of issues which arise in
'pure psychology' in the light of the paralogisms, and in particular the mind (or soul)-body
problem. The 'doctrine of the soul' relates to the physiology of the
(temporal) inner sense [a], that of the body to the object of the outer senses. And provided we consider inner and outer
appearances together as mere representations in experience then there can be
nothing strange in the 'association' of the two kinds of senses. The problem arises, according to Kant, when we think of outer
appearances as "things existing by themselves outside us, with the same quality
as that which they exist in us" and then try to relate them to our thinking
subject [A 386]. And it is to
deal with this that traditional
solutions have been proposed, such as physical influence, predetermined
harmony, and supernatural intervention none of which is successful [A
390-3]. In fact in the last analysis the
question how outer intuition (space which comprehends shape and motion) is
possible in a thinking subject is unanswerable. All we can do is to ascribe outer appearances to the transcendental
object and avoid treating the appearances as objects in themselves. Similar considerations apply to such matters as the existence of the
thinking subject after death [b]. He concludes:
Thus all controversy in regard to the
nature of the thinking being and its connection with the corporeal world is
merely a result of filling the gap where knowledge is wholly lacking to us with
paralogisms of reason, treating our thoughts as things and hypostatising
them. [A 395]
The
arguments for the second and third Ideas of Reason are called Antinomies [T.Dial., Bk II, ch. II]. Each
consists of a thesis and an antithesis which contradict each other, though Kant
says both can be proved. (The theses are supposed to be held by 'dogmatic
rationalists', the antitheses by 'empiricists'.) The first antinomy is concerned with the
question whether the world has or has not a beginning in time and limits in
space. The second addresses the question whether or not the
world is composed of simples (or composites of simples) [see sec. 3]. In the third antinomy Kant presents 'proofs'
of the thesis that there are both natural and free causes and of
the antithesis that there
is natural causation but no freedom. He suggests that all these contradictions can be
avoided if we relate the theses to both phenomena and noumena but the
antitheses to only the phenomenal world. In other words we should accept his Transcendental Idealism and not try
to push Reason beyond the limits of experience (transcendental realism) [B
511]. We shall then find that in the
case of the first two (the 'mathematical' antinomies) the theses and the
antitheses are all false being based on the assumption that the world exists
as a (finite or infinite) whole. In fact
it is neither, nor is it divisible finitely or infinitely. As for the other two ('dynamical'
antinomies), the theses and antitheses are both true but differentially. Things belonging to the phenomenal world are causally determined: but in the noumenal world there are free
causes [c][c]. Similarly in the case of the Theological Idea
[fourth antinomy]: the thesis is true
when applied to both worlds, while the antithesis is true only of the
phenomena. Kant concentrates his attack on three traditional
'proofs' for God's existence: the ontological, the cosmological, and the
teleological arguments [ch. III, secs 4-6]. He tries to show that the
ontological argument is the main one, in that the other two presuppose its
validity. The ontological
argument is fallacious, he says, because it assumes that existence is a
predicate, whereas the 'is' in statements is merely a copula linking the
predicate to its subject (as in 'God is omnipotent') [d]. By this he means that we do not add anything new to the concept of God
by saying that He exists; existence cannot therefore be a perfection, and God
may as well not exist. Also existential judgements are synthetic. It does not follow logically from a
definition of God as a necessary being that he actually exists
necessarily. Kant goes on to say in the
Appendix to the Transcendental Dialectic that although we cannot have knowledge of God (as an idea of
the unconditioned it is 'regulative' not 'constitutive'), together with the
Ideas of the soul and of freedom we need God for our morality and religion. That is why he had said in the Preface [B
xxx], "I have therefore
found it necessary to deny knowledge, in order to make room for faith" [e].
ETHICS
Groundwork of the Metaphysics of
Morals (1785):
the initial presentation of Kant's ethics.
Critique of Practical
Reason (1788): Part I, Book I (Analytic) consists a more formal statement of the Groundwork thesis; Book II (Dialectic)
offers a justification of morality.
[Sources: The edition of the Groundwork used is that of Paton (The Moral Law); and the edition of the Critique of Practical Reason is
Beck's. Number references in both cases
are to the pages of the standard Royal Prussian Academy edition of his works.]
[6] Although, according to Kant, we can have
no knowledge of the external world, he argues that the moral law [see Groundwork 389, Critique of Practical Reason, 32] has its origin in the freely
acting rational noumenal self and that it is willed onto the phenomenal world by the practical reason. (He
rejects all 'material principles' which purport to be determining grounds, for
example, physical and moral feeling, perfection, the will of God [a]; the first two, he says, are obviously
unfit; the latter two can be motives only by reason of the happiness expected
of them) [C.Pract.R., 40-41; Cf. Gr. 388-390]. To
understand what this means we must look at the distinction he makes between two kinds of imperatives (that is, commands) a hypothetical imperative (which is
analytic) and a categorical one
(which is synthetic) [Gr 37-44] [b]. Consider the reasons we may have for doing what is supposed to be
morally 'right', say telling the truth. We may wish to avoid punishment
(which for Kant is retributive as
required by 'the moral order' [see Philosophy
of Law] ) [c][c]; we may want to maximize our
happiness or that of other people; or maybe we feel that it would be against
our moral 'sense' or conscience to tell lies. Now Kant says that if we behave on the basis of such considerations, our
actions cannot be said strictly to have any moral worth. This is because we are acting in accordance
with a hypothetical imperative, which relates to subjective (empirical)
principles such as "education, civil
constitution, physical and moral feeling" or to objective (rational) principles
such as "perfection and the will of God". Our actions, he
says, can have moral worth only if they are in accordance with the categorical imperative, that is, if they
are done for the sake of duty [Gr. 9-11]. By this he means that we should act out of reverence (Achtung) for the (moral) law without
any consideration of the possible consequences of our actions and regardless of
the impulses and inclinations we have so far as we belong to the phenomenal
world. This notion of doing
something for the sake of duty is
central to Kant's ethics; it is not sufficient that ones actions should merely
be in accordance with it. A shopkeeper,
for example, may be honest and not overcharge his customers. But he could also be acting out of
self-interest so that his business might prosper. Even if he were motivated by love that would not
in itself guarantee the moral worth of his action. Only reverence for the moral law can provide
this. This underpins Kant's notion of a good will as the only
thing "which can be taken as good
without qualification" [Gr. 1-4, 8ff.] [d]. But he distinguishes between the imperfect (human) will and the
perfectly good 'holy' will (of God). The
former is 'necessitated' to act in conformity with the law the 'I
ought'. For the divine will' however,
there are no imperatives [Gr. 39].
How can we know that a particular course of
action accords with the categorical imperative and is thus performed for the
sake of duty? To answer this Kant introduces what he calls a maxim [Gr. 51-2, C.Pract.R.,
27-8]. This is a subjective principle on the
basis of which we decide to act. If the
maxim we adopt expresses the idea of obeying a universal law, it is said to be
a formal maxim and becomes an
objective principle, that is, the principle on which a rational being ought and
would act if he had full control over his desires. (Principles which relate to
ends or consequences are said to be empirical maxims.) This leads to Kant's first formulation of the
categorical imperative: "Act only on
that maxim through which you can at the same time will to become a universal
law" [Gr. 52] [e]. He gives four examples of
duties which, he claims, accord with this universal law [Gr. 53-7]. Two of them, concerning suicide and the keeping of
promises, allow of no exceptions. He
calls these perfect duties. If we
allowed that everybody might break their promises or might kill themselves then
there clearly there would be peculiar consequences: the concept of keeping a
promise race would lose its 'purchase', while in the case of suicide the human
race would become extinct. So we cannot
in practice universalize such maxims. The second two examples, which relate to the cultivation of ones talents
and the practice of benevolence, are, however, imperfect, in the sense that
although we may often give in to our inclinations we do not will that the maxim on which we act
should be universalized; but we recognise that its opposite should remain
universal. He goes on to give four more formulations of the categorical
imperative. (While it is the third
formulation which receives the most emphasis in the second Critique, Kant seems to regard the first formulation as the most
important in the Groundwork.) (2) We must act as if
our maxim were to become a universal law
of nature [Gr. 52, C.PractR., 31]; and (3) in such a way that our will can regard itself as producing universal law through that
maxim [Gr. 70-1, 76]. Also (4) in our
actions we must never
treat people including ourselves, just as means but also as rational beings and
hence as ends in themselves [Gr. 66-7]. Lastly (5), we
must act as if we were law-giving members of a universal kingdom of ends [Gr.
74-6]. As law-givers and law-obeyers individuals implicitly accept the general will of the people. For Kant this 'contract', however, is a regulative ideal and
not historically grounded. [See Fundamental
Principles of Law.] He argues that each member of society transfers his moral freedom
to the 'republic' but receives it back in the form of civil liberties. Nevertheless it is to be regarded as binding;
and there can be no right
to rebel against authority as the 'general will' even in imperfect states [f].
[7] When we act in
accordance with the categorical imperative we are acting autonomously, in contrast to the heteronomy of actions guided by the
hypothetical imperative [Gr. 87-9, C.Pract.R., 33ff.]. Now the principle of
autonomy (never to choose unless the
maxims you will are present in universal law) is, Kant says, a synthetic
statement, so we cannot prove it by analysing concepts. So he argues that to show how the categorical
imperative is possible we need a critique of practical reason. This brings him
back [Gr. III, 97ff., 113ff; C.Pract.R., Analytic ch. 3, 90ff.] to the antinomy examined in the first Critique between freedom and
necessity. Non-rational beings act in
accordance with natural necessity, but the wills of
rational beings are free. This does not mean that free action is
'lawless'; for the free will does not act causally. But, unlike the causes at work in the natural
or phenomenal world, the
will's 'causation' is self-imposed and involves accepting the categorical
imperative. The difficulty with
this, Kant says, is that it leads to a kind of circularity in our
reasoning. Freedom and self-legislation
are 'reciprocal' concepts, that is, they are dependent on each other; so neither
can serve as an explanation for the other. To get round this he suggests that
in using the two concepts we are adopting different standpoints. As free agents we think of ourselves as autonomous members of the
noumenal or intelligible world and as subject to the laws of reason (which
prescribes ought 'ought' implies 'can', we might say). But our actions have also to be seen as
factual events in the phenomenal world which are subject to the laws of natural
science. Natural necessity is a concept of the understanding:
whereas freedom is an Idea of Reason [a]. There is no contradiction. At this point in the Groundwork Kant says that he is now at the limit of moral enquiry
but that it is important to determine what the limit is. How is that a "bare principle" can supply a motive for acting rightly? How can pure reason be practical? He has
more to say about this motive in the Critique where he deals with the object of
practical reason and what is presupposed
if it is to be achieved.
[8] Kant's view is that what is sought in moral action
is the highest good (summum bonum) [Gr. 29, C.Pract.R., Dialectic, ch.
2]. What is this highest good? The Stoics had thought it was virtue and that we are aware that we are virtuous. The Epicureans, on the other hand, had
identified the highest good with happiness, virtue being that which we need to become happy. Kant says that the highest good is a synthesis
of both. However the concept is
known a priori and not derivable from
experience; the deduction
must be transcendental [C.Pract.R.,. 111-113] [a]. The good is not like the concept of 'well-being', which is defined in
terms of our feeling of happiness; and so it clearly presupposes the moral law. Further, the connection between virtue
and happiness is synthetic, yet the highest good is known a priori and is necessary practically. So how is it possible? How is this "antinomy of practical reason"
[ch. 2, I] to be resolved? [C.Pract.R., ch. 2, II.] The
desire for happiness cannot be a motive for a maxim of virtue (as he has
already shown). And a maxim of virtue
cannot be an efficient cause of happiness, because causality relates to natural
laws and not to the will. But, argues
Kant, the problem arises because we are confining ourselves to the phenomenal
world. If we think of ourselves as
belonging also to the noumenal realm, then we can see the moral law as a "pure
determining ground of our causality", and that there is a necessary connection between our intentions as (noumenal) cause and
our happiness as effect in the sensible world provided there is mediation by "an Intelligible Author of Nature"
to guarantee our happiness in proportion to morality. (This is in effect Kant's ethical 'proof' for the
existence of God as a "postulate of pure practical reason" [ch.
V].) He also argues [chs IV and VI] that immortality is necessary
to guarantee that the will is completely 'fit' to the moral law [b]. By this he means that we must think of our moral efforts as having
significance in that we can imagine that after death we might belong to a
universal kingdom of rational beings (ends in themselves) ruled by God. Thus
the categorical imperative (the fifth formulation is particularly relevant
here) requires the three Ideas of Reason Freedom, Immortality, and God.
AESTHETICS
AND PHILOSOPHY OF NATURE
The Critique of Judgement (1790)
[Source: The edition used is that of
Meredith. Number references are to the
pages of the Royal Prussian Academy edition.]
AESTHETICS
[9] In the second Critique Kant believed that had reconciled freedom and necessity by
means of the practical reason. But there remains a gulf between the
intelligible and natural worlds when considered from the standpoint of the
theoretical reason. One of his main aims
in the third Critique is to show how
they can be brought together by supposing that they can both be grounded in the
concept of judgement. Judgement, he says, mediates between
understanding and reason; and feeling mediates between knowing and
desiring. So if knowledge is a function
of the understanding, and desiring is a manifestation of the (practical)
reason, perhaps judgement may be assumed to have its own a a
priori principles which can legislate for feeling. He explores this further in the Introduction to the third Critique.
He defines 'judgement' as "the faculty of
thinking the particular under the universal" [Intro. IV]. Now, when we make a judgement (such as 'All
changes in bodies must have a cause') the universal is 'given' as an a priori category. In this case the judgement is said to be
'determinant'. But in physics, for example, we may have
to look for a universal, that is a general and empirical law, under which
particulars can be subsumed. Here
judgement is 'reflective'. The scientist wants to go further and try
to relate all his laws to a still more general unifying principle. Kant says that this is not given by the
understanding and must lie beyond experience. He calls it the
principle of 'finality' or 'purposiveness': Nature is represented as if it made up an
ordered and purposive whole [a]. The principle of the formal finality of
Nature [V] is a transcendental principle. It is a concept neither of Nature nor or freedom, but is a maxim of
judgement. [VI-VII.] Whenever we think of Nature in this way we experience a feeling of
'disinterested' pleasure. If this
feeling is linked immediately with a 'representation' of an object, the object
is said to be final and the representation aesthetic [b]. Kant
examines this in Part I of the Critique
of Judgement. Finality is here subjective (formal). Objective (real) finality, on the other hand, has nothing to do
with feelings of pleasure in things: rather, through the understanding and
reason, things are represented in their universals as if they were fulfilling a
purpose in Nature. In this case the
representation is said to be logical [VIII]. This is investigated in Part
II of the Critique. Kant goes on to argue that while the
judgement cannot prescribe laws in the way that the understanding and practical
reason do, it does have an a priori principle
for 'estimating' Nature; and this enables us by means of the aesthetic
representation to see Nature as a phenomenal manifestation of the underlying or
supersensible noumenal realm, and by the logical representation to think of
ends as being actualized in Nature according to its laws. Nature is seen to be in agreement with our
powers of cognition. In this way
judgement can effect the transition between the two worlds, and can allow us to
grasp the unity of reason. [See Intro.
III and IX.]
1. Critique
of Aesthetic Judgement
Kant distinguishes
between three kinds of aesthetic judgements: judgements of the 'agreeable' relating to the pleasantness of an
object; judgements of taste, which
refer to the beauty of objects; and judgements of the sublime. In the 'Analytic' [sections 1-54] he identifies four 'moments' or
characteristics which apply to both judgements of taste and judgements of the
sublime. Aesthetic judgements are (1) disinterested in their quality;
(2) universal in quantity;
(3) subjectively final in relation;
and (4) necessary in modality. His general thesis in relation to these
characteristics may be summarized as follows.
When we look at an object or scene which
we call beautiful or sublime we are not concerned whether the object actually
exists. We experience a feeling of delight; we take pleasure in the object. But this feeling of pleasure cannot be known (in the way that space and sensations can). The delight we experience is not based on any
private inclination or interest. We feel ourselves to be
completely free in respect to this
liking we have for the object; and we suppose other people to respond in a
similar way. As he says, an object is called beautiful when its form (as opposed to the matter of its representation, as sensation)
is,
without regard to any
concept to be obtained from it, estimated as the ground of a pleasure in the
representation of such an Object [as a result of which] this pleasure is also
to be judged to be combined necessarily with the representation of it, and so
not merely for the Subject apprehending this form, but for all in general who
pass this judgement. And the
faculty of judging by means of such a pleasure (and so also with universal
validity) is called taste. [C.J., Introduction, 190].
(Hegel noted [History of Philosophy,
iii] that this was "the first rational word concerning beauty".) We therefore attribute universal validity to our judgements of
taste. But as empirical judgements they
are not objectively necessary. According
to Kant, the explanation of their subjective universality lies in the harmonious free play of imagination and
understanding no determinate concept being invoked [c]. While the delight we have is seen to be necessarily linked with
the representation of the object, this necessity is neither theoretical (as in the
first Critique) nor practical (second Critique). Kant calls the
necessity 'exemplary' [237], by which he means that it is the necessity of the
assent of all to a judgement which is regarded as exemplifying a universal rule
although we cannot actually formulate the rule or relate it to specific
instances. As to the 'finality' of judgements of taste, Kant is
saying that in looking at the object we get the feeling that it in some fulfils
some end or purpose though we cannot conceptualize this. That is why he writes that 'Beauty is the
form of finality in an object, so far as perceived in it apart from the
representation of an end" [236]; and this 'form of finality' is the sole foundation of the judgement of
taste [d].
In Book II Kant embarks on an Analytic of the Sublime. Sublimity has much in common with beauty, but
there are important differences [23ff.]. Beauty is external
and grounded in the 'form' of the object, whereas sublimity involves
'formlessness' and lack of limits. Beauty is a concept of the understanding: sublimity is associated with
the pure reason. The most
important difference is that while beauty conveys a purposiveness in its form, sublimity is entirely
separate from the idea of a finality in Nature [e] and
involves only a kind of 'stretching' of and indeed passing beyond the
imagination. (Kant talks of the
imagination as being "outraged".) So
strictly speaking we should say that sublimity belongs not to natural objects
(for example, a stormy ocean) but to the
feelings (such as awe) they arouse in us. Kant in fact distinguishes between the mathematically sublime [25-27] and the dynamically sublime [28-29]. The former, which involves the knowing faculty and corresponds to the
first two 'moments', is "that which is absolutely great", in comparison with
which everything else is small, for example, the Pyramids or the Milky
Way. The pleasure we experience includes
a feeling of respect when we judge that the inadequacy of our imagination is in
accord with reason. The dynamically sublime, relating to the
second two 'moments', engages our faculty of desire. The violence of nature frightens us, but it
also enables us to recognise our independence of and superiority to Nature.
[The 'Deduction': 30ff.] As has been mentioned, judgements of taste conform to "law without a
law", are purposive though no purpose can be known, and arise from a harmony
between imagination and understanding, which is subjective. They cannot be
determined by either empirical or a
priori logical laws. So how are they possible? The pleasure or
displeasure they depend on, Kant says, arises from cognitive powers which
everybody is supposed to possess; and that this supposition is based on the communicability of the relevant
representations [39]. lt is an
"aesthetic common sense" [40]. (As for
judgements of the sublime, Kant does not think that they need to be justified
because here the subjective purposiveness belongs to the use to which objects
are put and not to their form. He has
said earlier that the necessity that the judgements of other people should
coincide with ours is based on the fact that such judgements are a product of
culture and are grounded in a natural capacity for moral feeling.) Later in the Deduction Kant discusses
artefacts, as contrasted with natural objects. A work of art is 'purposive' only within itself, though it can help to
develop our mental powers and thereby help communication in society. It is a product of genius [46ff.], that
is, "the talent or innate mental
aptitude, through which nature gives the rule to art". Genius has its own 'spirit': the faculty of
presenting aesthetic Ideas (the counterpart of Ideas of Reason). It is opposed to imitation and itself
supplies the 'material' for a work of art (though training is required for its
'form'). And Kant adds that
understanding, imagination, and taste are also all required; understanding
provides the artist with his goal, imagination (in addition to its normal role
as synthesizer of intuitions) 'remodels' Nature and taste as a judgement
'disciplines' or 'corrects' genius.
As in the other Critiques, the Analytic is
followed by a Dialectic [55-60]. Kant
first claims to have solved an antinomy that the judgement of taste both is
and is not based on concepts. There is
no inconsistency, he says, if we say the judgement is not grounded in (determinate) concepts (the thesis); and that it is based on an (indeterminate) concept, namely the supersensible
substrate of phenomena. He goes on to
say that because this same
noumenal substrate is also the principle underlying freedom and the choice of
moral ends a connection can be made between the aesthetic judgement and ethics [f]. The beautiful and the moral, despite their differences, are clearly
similar in that (1) they both please immediately; (2) they are not bound up
with any interest prior to judgement;
(3) they involve harmony respectively between the imagination and the
understanding, and between the will with itself according to the law of
practical reason; (4) the subjective principle in aesthetic judgement and the
objective principle of morality both claim universality. Beauty is the symbol of the morally good, and taste is thus a faculty
for judging sensible representations of moral ideas by means of an analogy [g].
PHILOSOPHY OF NATURE
2. Critique of Teleological Judgement
[10] In the 'Analytic' [62-68] Kant distinguishes between (a) formal and material and (b) subjective and objective finality [62]. Formal (or intellectual) finality deals with
possibility, not the existing things which are the concern of material
teleological judgements. In mathematics,
for example, the formal judgement might be about the suitability of a circle
for the construction of a particular kind of triangle. The finality is objective because it does not
involve the feelings of the person making the judgement. Material judgements are subjective if they
relate to human concerns (as we saw in the case of aesthetic finality). But if they refer to purpose in nature they
are said to be objective. He makes a
further distinction between relative and intrinsic or absolute finality [63]. Suppose we say the existence of reindeer in Lapland benefits the
inhabitants. By attributing
purposiveness to the presence of these animals we seem to be explaining their
existence. But Kant says it is an
empirical and hypothetical matter that there should be men living in such a
region. We cannot see any causal link
between the two factors. Intrinsic
final judgements, however, state that a thing is an end in itself: "a thing exists as an end of Nature if it is,
though in two senses, both cause and effect of itself' [64]. Thus a tree (i) generates another tree, (ii)
produces itself as an individual (through growth), (iii) as a whole, is
reciprocally dependent on its parts, for example, its leaves. In such natural things each part not only
exists through the agency of their other parts but also for the sake of both
those other parts and the whole, that is, as an instrument or organ. Also, in contrast to, say, a watch the parts
must be organisms reciprocally producing each other; the product is both
organized and self-organized, that is has formative power [65]. This principle for judging internal purposiveness, although derived
from experience, must be grounded in an a
priori principle because it predicates the universality and necessity of
the finality attributed to Nature, which is a regulative and not a constitutive
Idea [66ff.] [a]. Kant
goes on to stress that an advance has been made in finding in Nature a capacity
for producing objects which we can think of in terms of final causes even
where it is not necessary to move beyond mechanical causation; for objects in
the latter case may still be supposed to form part of a system of ends.
Now while it would seem that the concept
of purposiveness is required for self-organizing beings, mechanical causality
being inadequate, the Idea
of the finality of Nature is applicable to the whole of Nature in that it
points beyond sense-experience to the supersensible substrate [b]. Moreover, the fact that all natural objects belong to the phenomenal
realm gives rise to an antinomy between the two regulative principles or maxims
of judgement: that some products of
material nature must be judged as possible on the basis of mechanical laws,
whereas others cannot and require final causes. If these maxims could be converted into
constitutive principles of the possibility of objects we should have a contradiction
between (thesis) "All production of material things is possible on mere
mechanical laws", and (antithesis) "Some production of such things is not
possible on mere mechanical laws" [70]. In the Dialectic [69-78] Kant argues
that neither assertion can be proved a
priori. Furthermore, the judgement cannot give us
these constitutive principles. The contradiction is therefore avoided. In science we appeal to mechanical causality, but when this proves
inadequate or has reached its explanatory limits we have to introduce the
concept of final causality [c]
Final causality leads on to theology; and
this forms the greater part of the content of the remaining sections of the
Dialectic. After a historical digression
to examine the inadequacies of various systems, including theism, which purport
to deal with the finality of nature, Kant says [73] that he nevertheless sees theism as the best in so far as
it attributes purposiveness in Nature to a supreme intelligent being, God, and
thus provides us with a seemingly acceptable world-view in which final and
mechanical causality might be reconciled in the supersensible substrate [d]. (In this way he would be able to bridge
the gap between the first two Critiques.) But teleology
cannot prove the existence of such a being; the Idea of purpose in Nature is
regulative and not constitutive and can act only as a guide for reflective
judgement. In so far
as its objects are physical generations and their causes, teleology does not
form a branch of theology. Neither does
it form part of natural science, for this requires determinant and not just
reflective principles [Appendix, 79ff]. But it is a science in that it is a critique (of judgement); and to the
extent it contains a priori principles and must therefore specify the
method by which Nature must be judged according to final causes. It thus exerts
an influence (although negative) upon the procedure to be adopted in natural science
and also affects the metaphysical bearing this science may have on
theology. The 'physico-theological' proof for the existence of God,
being based on empirical data, can provide no more than "artificial
understanding" for miscellaneous ends; it cannot give wisdom for a final end which is outside
Nature [85ff.] [e]. An 'ethico-theology', however, involves inference from a moral end
which can be known a priori;
and Nature considered as a moral Kingdom of Ends demands the existence of an
Original Being, omniscient of the summum
bonum, omnipotent, all-good, just, and eternal, who has created the
universe for a moral purpose [see the second Critique]. The moral proof, however, is not objectively valid [87ff.]. God's existence as "a not-sensible something containing the ultimate
ground of the world of sense" [90] is a matter of practical faith to which one commits
oneself freely [91]; and
although He can be understood through symbols and analogy we can have no
theoretical knowledge of Him [f].
RELIGION
[11] [see also sec. 10] [See Religion Within the Bounds of Mere Reason.] It is clear from his three Critiques that
Kant rejected traditional dogmatic religion and metaphysical 'proofs' for God's existence. Instead he advocates a 'pure religion of
morality' his 'ethico-theology, with its presuppositions of God and
immortality (though as regulative Ideas of Reason they are not proper objects
of knowledge). Kant believes that the
moral life is best preserved in Christianity, but he does not regard its
traditions and ceremonies as important and he radically reinterprets that
religion's doctrines. We may say that in his deism Christianity is
essentially demythologized. It is
through our feeling for nature and our conscience that we may have access to
God [a]; and these are the sources of the faith
(to make room for which he had denied knowledge) [see end of sec. 5 above]. As he says [Critique of Practical Reason, 161-2]:
Two things fill the
mind with ever new and increasing admiration and awe, the oftener and more
steadily we reflect on them: the starry
heavens above me and the moral law within me. I do not merely conjecture them and seek them as though obscured in
darkness or in the transcendent region beyond my horizon: I see them before me, and I associate them directly
with the consciousness of my own existence.
CRITICAL SUMMARY
Kant's views on
epistemology and metaphysics turn essentially on his approach to the
analytic-synthetic distinction and on the possibility of synthetic a priori judgements. If he is correct, then we can have knowledge
of the external world as phenomenon because we in some sense contribute to our
experience of it: but he will not allow
that we can pass beyond the limits of that experience to have any kind of
knowledge of things in themselves, though he needs the idea of a noumenal world
for his ethics and philosophy of Nature. There are many difficulties with his thesis.
(1) It is often not easy to decide whether a given
statement is or is not analytic. Why
should extension, but not heaviness, be supposed to belong to the concept of
body'? What he says about the
'necessity' of synthetic a priori statements
also needs to be questioned. He appeals
to the a priori status of space and
time and the alleged grounding in them of the truths of geometry and arithmetic
respectively. But most philosophers
today say that mathematical statements are analytic, and that the possibility
of alternative (non-Euclidean) geometries may also undermine Kant's
position. In answer to this it might be
said that he is concerned only with our actual perceptions.
(2) Kant's account of the categories has been
criticized. He is not always clear and
consistent in distinguishing between pure concepts and empirical concepts. His
grounding of the categories in the Aristotelian forms of judgement is perhaps
artificial especially when seen from the wider vantage point of modern symbolic
logic. His arguments relating to the
analogies may also be seen as suspect. It is not clear whether the permanence he refers to is absolute or
relative. Is it time itself that is
supposed not to change, or time as a form of intuition? And he seems not to have distinguished
satisfactorily between logical or causal necessity and coincidence.
(3) Perhaps most
controversial is Kant's distinction between phenomena and noumena. Sometimes he talks of noumena as non-spatial
things in themselves, which we can know nothing about; the world therefore
consists of phenomena and noumena [A 30, 371 ]. (This interpretation would
appear to be the one that Husserl held). Elsewhere it seems that Kant does not regard them as objects at
all. Rather the concept is introduced as
a limit to show the impossibility of our going beyond experience; the world
consists only of phenomena [A 255, 257]. It is difficult to decide between these two positions: but it is reasonable to suppose that tended
towards the weaker ('limit') view but found it difficult to shake himself free
from the more Berkeleyan view of objects as representations which cannot exist
independently of our perceptions. It
should also be noted that Kant's interpretations of Berkeley and Descartes are
questionable.
(4) Kant's arguments against the paralogisms make
up an important criticism of Descartes' cogito thesis. The validity of the
antinomies, however, is itself doubtful. And it has been suggested (a) that recent developments in physics may
well damage his account of the third antinomy, given his commitment to
Newtonian science; and (b) that the ambiguity of his account of the noumenal
world might cause difficulties for the view that we can think of ourselves as free
beings. His objections to traditional
'proofs' of the existence of God, on the other hand, are regarded by many
philosophers as being sound. Kant's own
convictions concerning God relate, more controversially, to what he has to say
about ethics, into which he carries over his two-world distinction. In general
it may be said that in his epistemology and metaphysics he both brings together
and passes beyond the central tenets of rationalism and empiricism.
(5) According to Kant, reason in its theoretical
aspect cannot pass beyond the limits of experience. But in his ethics he argues that the
practical reason, or rational will, enables us to discover and act in
accordance with the moral law, which is grounded in the noumenal realm. But the central and most original features
of Kant's moral philosophy his emphasis on action performed for the sake of
duty, and the categorical imperative as a criterion of moral worth are at the
same time the elements in his thought most open to objections. Firstly, it might be said that his
'formalist' approach does not seem to fit in with our everyday 'intuitions'
about what is right or good. Kant would
of course reply, so much the worse for our ordinary views. A more telling objection, however, may be
made against the categorical imperative, especially in its main
formulation. Can it always be shown that
the maxim on which we act is universalizable? Is the test that there should be an absence of
contradiction, or less rigorously that the universalization simply does not
'work' or leads to absurd or sterile consequences, in which case the
test might even seem to be utilitarian? There is also a problem when maxims are qualified in some way. Kant says killing is wrong and yet approves
of capital punishment. If still further
'special' cases were allowed, would not the maxims become so particular that
universalizability would be superfluous? There is a third difficulty in relation to the final formulation of
the imperative. While emphasizing duty
Kant yet thinks in terms of a Kingdom of Ends in which we might ultimately
enjoy supreme happiness. It is arguable
that this end and the concept of duty might not be as sharply separated as he
would wish. Can we entirely disregard
such happiness for others as well as ourselves as a motivating factor?
(6) As for the third Critique, although it has tended to be overshadowed by the other
two, what Kant has to say about art and finality is important in this history
of philosophy, as is also his account of the difference between beauty and
sublimity. However, it can be objected
that his formalism in aesthetics, as in his ethics, does not work well in
practice. Disagreement about the beauty
or excellence of, say, a painting should not occur if Kant were correct when he
claims that one person's judgement should coincide with everybody else's. This suggests that his transcendental
deduction is invalid.
(7) The second part of the Critique is interesting for Kant's discussion of mechanical and teleological
explanation. It is clearly relevant to
the distinction later to be made between the methods supposed to applicable in
the natural sciences (Naturwissenschaften) and those appropriate to the 'social'
or 'human' sciences (Geisteswissenschaften). But it is an open question whether Kant is
justified when he claims to have reconciled, through the faculty of judgement,
the phenomenal realm (to which science applies) and the noumenal realm (as
revealed in art and Nature, considered as an end in relation to God, and
realized through the practical reason).
Kant: Kritik der reinen Vernunft, (1st edition, 1781; 2nd edition, 1787) (Critique of Pure Reason); Prolegomena
zu einer jeden knftigen Metaphysik die als Wissenschaft auftreten knnen (1783) (Prolegomena to any Future Metaphysics; Kritik der praktischen Vernunft (1788)
(Critique of Practical Reason); Grundlegung zur Metaphysik der Sitten (1785) (Foundations of the Metaphysics of Morals); Kritik der
Urteilskraft (1790) (Critique of Judgement); Die Religion
innerhalb der Grenzen der blossen Vernunft (1793) (Religion within the
Limits of Mere Reason); Metaphysik der Sitten (1797) [I. Metaphysische
Anfangsgrnde der Rechtslehre; II. Metaphysische Anfangsgrnde der
Tugendlehre] (Metaphysic
of Morals: I. Metaphysical
Principles of Law; II. Metaphysical Principles of Virtue).
There is a
plethora of English translations of these (and many other ) works of Kant. For the first Critique the edition of N.
Kemp Smith (2nd edn) is still probably the most convenient. However, there are recent translations by
P. Guyer and A. Wood, and by V. Politis. For the Prolegomena see P.
G. Lucas, L. W. Beck, or J. Ellington; for the second Critique: Beck; Foundations: H. J. Paton, The
Moral Law, or Ellington. (Both of
these works on ethics are contained in M. Gregor (ed.), Practical Philosophy.) The third Critique: see the translation by J. C. Meredith or a
more recent one by W. Pluhar. There is
an edition of Religion within the Limits of Mere Reason by T. M. Greene
& H. H. Hudson. The Metaphysic of
Morals is translated by M. Gregor & R. J. Sullivan.
Note that the literature on Kant is enormous; there is therefore inevitably an element of
arbitrariness in the following selection. However, these titles do represent a range of interpretations and they
should help you to find your way around the thought of this important but difficult philosopher.
Studies:
Introductory/ overall perspective
S. Körner, Kant.
R. Scruton, Kant.
Advanced/ covering specific areas
H. B. Acton, Kant's Moral Philosophy.
H. Allison, Kant's Transcendental Idealism: An Interpretation and Defense.
D. Crawford, Kant's Aesthetic Theory.
A. C. Ewing, A Short Commentary on Kant's Critique of Pure Reason.
N. Kemp-Smith, A Commentary of Kant's Critique of Pure Reason.
H. J. Paton, The Categorical Imperative.
E. Schaper, Studies in Kant's Aesthetics.
P. F. Strawson, The Bounds of Sense.
R. Walker, Kant.
T. E. Wilkerson, Kant's 'Critique of Pure
Reason': A Commentary for Students.
Collections of essays
P. Guyer (ed.), The Cambridge Companion to Kant.
R. Walker (ed.), Kant on Pure Reason.
R. P. Wolff (ed.), Kant: A Collection of Critical Essays.
CONNECTIONS
Kant