"The understanding is of course in possession a priori of universal laws of nature, without which nature could not be an object of experience at all; but still it requires in addition a certain order of nature in its particular rules, which can only be known to it empirically and which form its point"
"Now as an end in general is that the concept of which can be regarded as the ground of the possibility of the object itself, thus in order to represent an objective purposiveness in a thing the concept of what sort of thing it is supposed to be must come first. (5:227)"