we require not merely the concept of a possible purpose, but the knowledge of the final purpose (scopus) of nature. But this requires a reference of such knowledge to something supersensible far transcending all our teleological knowledge of nature, for the purpose of [the existence of] nature must itself be sought beyond nature. The internal form of a mere blade of grass is sufficient to show that for our human faculty of judgement its origin is possible only according to the rule of purposes.

But if we change our point of view and look to the use which other natural beings make of it, abandon the consideration of its internal organisation and only look to its externally purposive references, we shall arrive at no categorical purpose; all this purposive reference rests on an ever more distant