Critique of Judgement by Immanuel Kant Chapter 70 Page 1

Representation of this antinomy

So far as Reason has to do with nature, as the complex of objects of external sense, it can base itself partly upon laws which the Understanding itself prescribes a priori to nature, partly upon laws which it can extend indefinitely by means of the empirical determinations occurring in experience. To apply the former kind of laws, i.e. the universal laws of material nature in general, the Judgement needs no special principle of reflection, since it is there determinant because an objective principle is given to it through Understanding.

But as regards the particular laws that can only be made known to us through experience, there can be under them such great manifoldness and diversity, that the Judgement must serve as its own