Now such a whole would be an effect (product) the representation of which is regarded as the cause of its possibility; but the product of a cause whose determining ground is merely the representation of its effect is called a purpose. Hence it is merely a consequence of the particular constitution of our Understanding, that it represents products of nature as possible, according to a different kind of causality from that of the natural laws of matter, namely, that of purposes and final causes. Hence also this principle has not to do with the possibility of such things themselves (even when considered as phenomena) according to the manner of their production, but merely with the judgement upon them which is possible to our Understanding. Here we see at once why it is that in natural science we are not long contented with