Of the necessary subordination of the mechanical to the teleological principle in the explanation of a thing as a natural purpose

The privilege of aiming at a merely mechanical method of explanation of all natural products is in itself quite unlimited; but the faculty of attaining thereto is by the constitution of our Understanding, so far as it has to do with things as natural purposes, not only very much limited but also clearly bounded.

For, according to a principle of the Judgement, by this process alone nothing can be accomplished towards an explanation of these things; and consequently the judgement upon such products must always be at the same time subordinated by us to a teleological principle.

It is therefore rational, even