NEITHER MIXTURE NOR ITS PRINCIPLE WILL EXPLAIN LIFE AS A BODY.
The most irrational theory of all is that an aggregation of molecules should produce life, that elements without intelligence should beget intelligence. Others (like Alexander of Aphrodisia) insist that to produce life these elements must be mingled in a certain manner. That would, however, imply (as thought Gallen and Hippocrates[38]) the existence of a principle which produces order, and which should be the cause of mixture or, temperament,[39] and that should alone deserve being considered as soul. No simple bodies could exist, much less composite bodies, unless there was a soul in the universe; for it is (seminal) reason which, in, adding itself to matter, produces body.[40] But surely a (seminal) reason could proceed from nowhere except a soul.