Kant's Critique of Judgement

by Immanuel Kant

If we propose to set forth the origin of these fundamental propositions and try to do so by the psychological method, we violate their sense. For they do not tell us what happens, i.e. by what rule our cognitive powers actually operate, and how we judge, but how we ought to judge; and this logical objective necessity does not emerge if the principles are merely empirical. Hence that purposiveness of nature for our cognitive faculties and their use, which is plainly apparent from them, is a transcendental principle of judgements, and needs therefore also a Transcendental Deduction, by means of which the ground for so judging must be sought in the sources of cognition a priori.

We find in the grounds of the possibility of an experience in the very first place something necessary, viz. the universal laws without which nature in general (as an object of sense) cannot be thought; and these rest upon the Categories, applied to the formal conditions of all intuition possible for us, so far as it is also given a priori. Now under these laws the Judgement is determinant, for it has nothing to do but to subsume under given laws. For example, the Understanding says that every change has its cause (universal law of nature); the transcendental Judgement has nothing further to do than to supply a priori the condition of subsumption under the concept of the Understanding placed before it, i.e. the succession [in time] of the determinations of one and the same thing. For nature in general (as an object of possible experience) that law is cognised as absolutely necessary.—But now the objects of empirical cognition are determined in many other ways than by that formal time-condition, or, at least as far as we can judge a priori, are determinable. Hence specifically different natures can be causes in an infinite variety of ways, as well as in virtue of what they have in common as belonging to nature in general; and each of these modes must (in accordance with the concept of a cause in general) have its rule, which is a law and therefore brings necessity with it, although we do not at all comprehend this necessity, in virtue of the constitution and the limitations of our cognitive faculties. We must therefore think in nature, in respect of its merely empirical laws, a possibility of infinitely various empirical laws, which are, as far as our insight goes, contingent (cannot be cognised a priori), and in respect of which we judge nature, according to empirical laws and the possibility of the unity of experience (as a system according to empirical laws), to be contingent. But such a unity must be necessarily presupposed and assumed, for otherwise there would be no thoroughgoing connexion of empirical cognitions in a whole of experience. The universal laws of nature no doubt furnish such a connexion of things according to their kind as things of nature in general, but not specifically, as such particular beings of nature. Hence the Judgement must assume for its special use this principle a priori, that what in the particular (empirical) laws of nature is from the human point of view contingent, yet contains a unity of law in the combination of its manifold into an experience possible in itself—a unity not indeed to be fathomed by us, but yet thinkable. Consequently as the unity of law in a combination, which we cognise as contingent in itself, although in conformity with a necessary design (a need) of Understanding, is represented as the purposiveness of Objects (here of nature); so must the Judgement, which in respect of things under possible (not yet discovered) empirical laws is merely reflection, think of nature in respect of the latter according to a principle of purposiveness for our cognitive faculty, which then is expressed in the above maxims of the Judgement. This transcendental concept of a purposiveness of nature is neither a natural concept nor a concept of freedom, because it ascribes nothing to the Object (of nature), but only represents the peculiar way in which we must proceed in reflection upon the objects of nature in reference to a thoroughly connected experience, and is consequently a subjective principle (maxim) of the Judgement. Hence, as if it were a lucky chance favouring our design, we are rejoiced (properly speaking, relieved of a want), if we meet with such systematic unity under merely empirical laws; although we must necessarily assume that there is such a unity without our comprehending it or being able to prove it.

In order to convince ourselves of the correctness of this Deduction of the concept before us, and the necessity of assuming it as a transcendental principle of cognition, just consider the magnitude of the problem. The problem, which lies a priori in our Understanding, is to make a connected experience out of given perceptions of a nature containing at all events an infinite variety of empirical laws. The Understanding is, no doubt, in possession a priori of universal laws of nature, without which nature could not be an object of experience; but it needs in addition a certain order of nature in its particular rules, which can only be empirically known and which are, as regards the Understanding, contingent. These rules, without which we could not proceed from the universal analogy of a possible experience in general to the particular, must be thought by it as laws (i.e. as necessary), for otherwise they would not constitute an order of nature; although their necessity can never be cognised or comprehended by it. Although, therefore, the Understanding can determine nothing a priori in respect of Objects, it must, in order to trace out these empirical so-called laws, place at the basis of all reflection upon Objects an a priori principle, viz. that a cognisable order of nature is possible in accordance with these laws. The following propositions express some such principle. There is in nature a subordination of genera and species comprehensible by us. Each one approximates to some other according to a common principle, so that a transition from one to another and so on to a higher genus may be possible. Though it seems at the outset unavoidable for our Understanding to assume different kinds of causality for the specific differences of natural operations, yet these different kinds may stand under a small number of principles, with the investigation of which we have to busy ourselves. This harmony of nature with our cognitive faculty is presupposed a priori by the Judgement, on behalf of its reflection upon nature in accordance with its empirical laws; whilst the Understanding at the same time cognises it objectively as contingent, and it is only the Judgement that ascribes it to nature as a trancendental purposiveness (in relation to the cognitive faculty of the subject). For without this presupposition we should have no order of nature in accordance with empirical laws, and consequently no guiding thread for an experience ordered by these in all their variety, or for an investigation of them.

For it might easily be thought that, in spite of all the uniformity of natural things according to the universal laws, without which we should not have the form of an empirical cognition in general, the specific variety of the empirical laws of nature including their effects might yet be so great, that it would be impossible for our Understanding, to detect in nature a comprehensible order; to divide its products into genera and species, so as to use the principles which explain and make intelligible one for the explanation and comprehension of another; or out of such confused material (strictly we should say, so infinitely various and not to be measured by our faculty of comprehension) to make a connected experience.

The Judgement has therefore also in itself a principle a priori of the possibility of nature, but only in a subjective aspect; by which it prescribes, not to nature (autonomy), but to itself (heautonomy) a law for its reflection upon nature. This we might call the law of the specification of nature in respect of its empirical laws. The Judgement does not cognise this a priori in nature, but assumes it on behalf of a natural order cognisable by our Understanding in the division which it makes of the universal laws of nature when it wishes to subordinate to these the variety of particular laws. If then we say that nature specifies its universal laws according to the principles of purposiveness for our cognitive faculty, i.e. in accordance with the necessary business of the human Understanding of finding the universal for the particular which perception offers it, and again of finding connexion for the diverse (which however is a universal for each species) in the unity of a principle,—we thus neither prescribe to nature a law, nor do we learn one from it by observation (although such a principle may be confirmed by this means). For it is not a principle of the determinant but merely of the reflective Judgement. We only require that, be nature disposed as it may as regards its universal laws, investigation into its empirical laws may be carried on in accordance with that principle and the maxims founded thereon, because it is only so far as that holds that we can make any progress with the use of our Understanding in experience, or gain knowledge.

VI. OF THE COMBINATION OF THE FEELING OF PLEASURE WITH THE CONCEPT OF THE PURPOSIVENESS OF NATURE.

The thought harmony of nature in the variety of its particular laws with our need of finding universality of principles for it, must be judged as contingent in respect of our insight, but yet at the same time as indispensable for the needs of our Understanding, and consequently as a purposiveness by which nature is harmonised with our design, which, however, has only knowledge for its aim. The universal laws of the Understanding, which are at the same time laws of nature, are just as necessary (although arising from spontaneity) as the material laws of motion. Their production presupposes no design on the part of our cognitive faculty, because it is only by means of them that we, in the first place, attain a concept of what the cognition of things (of nature) is, and attribute them necessarily to nature as Object of our cognition in general. But, so far as we can see, it is contingent that the order of nature according to its particular laws, in all its variety and heterogeneity possibly at least transcending our comprehension, should be actually conformable to these [laws]. The discovery of this [order] is the business of the Understanding which is designedly borne towards a necessary purpose, viz. the bringing of unity of principles into nature, which purpose then the Judgement must ascribe to nature, because the Understanding cannot here prescribe any law to it.

The attainment of that design is bound up with the feeling of pleasure, and since the condition of this attainment is a representation a priori,—as here a principle for the reflective Judgement in general,—therefore the feeling of pleasure is determined by a ground a priori and valid for every man, and that merely by the reference of the Object to the cognitive faculty, the concept of purposiveness here not having the least reference to the faculty of desire. It is thus quite distinguished from all practical purposiveness of nature.

In fact, although from the agreement of perceptions with laws in accordance with universal natural concepts (the categories), we do not and cannot find in ourselves the slightest effect upon the feeling of pleasure, because the Understanding necessarily proceeds according to its nature without any design; yet, on the other hand, the discovery that two or more empirical heterogeneous laws of nature may be combined under one principle comprehending them both, is the ground of a very marked pleasure, often even of an admiration, which does not cease, though we may be already quite familiar with the objects of it. We no longer find, it is true, any marked pleasure in the comprehensibility of nature and in the unity of its divisions into genera and species, whereby are possible all empirical concepts, through which we cognise it according to its particular laws. But this pleasure has certainly been present at one time, and it is only because the commonest experience would be impossible without it that it is gradually confounded with mere cognition and no longer arrests particular attention. There is then something in our judgements upon nature which makes us attentive to its purposiveness for our Understanding—an endeavour to bring, where possible, its dissimilar laws under higher ones, though still always empirical—and thus, if successful, makes us feel pleasure in that harmony of these with our cognitive faculty, which harmony we regard as merely contingent. On the other hand, a representation of nature would altogether displease, by which it should be foretold to us that in the smallest investigation beyond the commonest experience we should meet with a heterogeneity of its laws, which would make the union of its particular laws under universal empirical laws impossible for our Understanding. For this would contradict the principle of the subjectively-purposive specification of nature in its genera, and also of our reflective Judgement in respect of such principle.

This presupposition of the Judgement is, however, at the same time so indeterminate as to how far that ideal purposiveness of nature for our cognitive faculty should be extended, that if we were told that a deeper or wider knowledge of nature derived from observation must lead at last to a variety of laws, which no human Understanding could reduce to a principle, we should at once acquiesce. But still we more gladly listen to one who offers hope that the more we know nature internally, and can compare it with external members now unknown to us, the more simple shall we find it in its principles, and that the further our experience reaches the more uniform shall we find it amid the apparent heterogeneity of its empirical laws. For it is a mandate of our Judgement to proceed according to the principle of the harmony of nature with our cognitive faculty so far as that reaches, without deciding (because it is not the determinant Judgement which gives us this rule) whether or not it is bounded anywhere. For although in respect of the rational use of our cognitive faculty we can determine such bounds, this is not possible in the empirical field.