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.