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But in the solution given above of the Antinomy of the principles of the mechanical and teleological methods of production of organic beings of nature, we have seen that they are merely principles of the reflective Judgement in respect of nature as it produces forms in accordance with particular laws (for the systematic connexion of which we have no key). They do not determine the origin of these beings in themselves; but only say that we, by the constitution of our Understanding and our Reason, cannot conceive it in this kind of being except according to final causes. The greatest possible352 effort, even audacity, in the attempt to explain them mechanically is not only permitted, but we are invited to it by Reason; notwithstanding that we know from the subjective grounds of the particular species and limitations of our Understanding (not e.g. because the mechanism of production would contradict in itself an origin according to purposes) that we can never attain thereto. Finally, the compatibility of both ways of representing the possibility of nature may lie in the supersensible principle of nature (external to us, as well as in us); whilst the method of representation according to final causes may be only a subjective condition of the use of our Reason, when it not merely wishes to form a judgement upon objects as phenomena, but desires to refer these phenomena together with their principles to their supersensible substrate, in order to find certain laws of their unity possible, which it cannot represent to itself except through purposes (of which the Reason also has such as are supersensible).
We have shown in the preceding that, though not for the determinant but for the reflective Judgement, we have sufficient cause for judging man to be, not merely like all organised beings a natural purpose, but also the ultimate purpose of nature here on earth; in reference to whom all other natural things constitute a system of purposes according to fundamental propositions of Reason. If now that must be found in man himself, which is to be furthered as a purpose by means of his353 connexion with nature, this purpose must either be of a kind that can be satisfied by nature in its beneficence; or it is the aptitude and skill for all kinds of purposes for which nature (external and internal) can be used by him. The first purpose of nature would be man's happiness, the second his culture.
The concept of happiness is not one that man derives by abstraction from his instincts and so deduces from his animal nature; but it is a mere Idea of a state, that he wishes to make adequate to the Idea under merely empirical conditions (which is impossible). This Idea he projects in such different ways on account of the complication of his Understanding with Imagination and Sense, and changes so often, that nature, even if it were entirely subjected to his elective will, could receive absolutely no determinate, universal and fixed law, so as to harmonise with this vacillating concept and thus with the purpose which each man arbitrarily sets before himself. And even if we reduce this to the true natural wants as to which our race is thoroughly agreed, or on the other hand, raise ever so high man's skill to accomplish his imagined purposes; yet, even thus, what man understands by happiness, and what is in fact his proper, ultimate, natural purpose (not purpose of freedom), would never be attained by him. For it is not his nature to rest and be contented with the possession and enjoyment of anything whatever. On the other side, too, there is something wanting. Nature has not taken him for her special darling and favoured him with benefit above all animals. Rather, in her destructive operations,—plague, hunger, perils of waters, frost,354 assaults of other animals great and small, etc.,—in these things has she spared him as little as any other animal. Further, the inconsistency of his own natural dispositions drives him into self-devised torments, and also reduces others of his own race to misery, by the oppression of lordship, the barbarism of war, and so forth; he, himself, as far as in him lies, works for the destruction of his own race; so that even with the most beneficent external nature, its purpose, if it were directed to the happiness of our species, would not be attained in an earthly system, because our nature is not susceptible of it. Man is then always only a link in the chain of natural purposes; a principle certainly in respect of many purposes, for which nature seems to have destined him in her disposition, and towards which he sets himself, but also a means for the maintenance of purposiveness in the mechanism of the remaining links. As the only being on earth which has an Understanding and, consequently, a faculty of setting arbitrary purposes before itself, he is certainly entitled to be the lord of nature; and if it be regarded as a teleological system he is, by his destination, the ultimate purpose of nature. But this is subject to the condition of his having an Understanding and the Will to give to it and to himself such a reference to purposes, as can be self-sufficient independently of nature, and, consequently, can be a final purpose; which, however, must not be sought in nature itself.
But in order to find out where in man we have to place that ultimate purpose of nature, we must seek out what nature can supply to prepare him for what he must do himself in order to be a final purpose, and we must separate it from all those purposes whose possibility depends upon things355 that one can expect only from nature. Of the latter kind is earthly happiness, by which is understood the complex of all man's purposes possible through nature, whether external nature or man's nature; i.e. the matter of all his earthly purposes, which, if he makes it his whole purpose, renders him incapable of positing his own existence as a final purpose, and being in harmony therewith. There remains therefore of all his purposes in nature only the formal subjective condition; viz. the aptitude of setting purposes in general before himself, and (independent of nature in his purposive determination) of using nature, conformably to the maxims of his free purposes in general, as a means. This nature can do in regard to the final purpose that lies outside it, and it therefore may be regarded as its ultimate purpose. The production of the aptitude of a rational being for arbitrary purposes in general (consequently in his freedom) is culture. Therefore, culture alone can be the ultimate purpose which we have cause for ascribing to nature in respect to the human race (not man's earthly happiness or the fact that he is the chief instrument of instituting order and harmony in irrational nature external to himself).
But all culture is not adequate to this ultimate purpose of nature. The culture of skill is indeed the chief subjective condition of aptitude for furthering one's purposes in general; but it is not adequate to furthering the will126 in the determination and choice of purposes, which yet essentially belongs to the whole extent of an aptitude for purposes. The latter condition of aptitude, which we might call the culture of training (discipline), is negative, and356 consists in the freeing of the will from the despotism of desires. By these, tied as we are to certain natural things, we are rendered incapable even of choosing, while we allow those impulses to serve as fetters, which Nature has given us as guiding threads that we should not neglect or violate the destination of our animal nature—we being all the time free enough to strain or relax, to extend or diminish them, according as the purposes of Reason require.
