But the likeness in men consists more in the configuration of the bodies: and it is of no little consequence in what bodies the soul is lodged; for there are many things which depend on the body that give an edge to the soul, many which blunt it.

Aristotle, indeed, says that all men of great genius are melancholy; so that I should not have been displeased to have been somewhat duller than I am.

He instances many, and, as if it were matter of fact, brings his reasons for it.

But if the power of those things that proceed from the body be so great as to influence the mind (for they are the things, whatever they are, that occasion this likeness), still that does not necessarily prove why a similitude of souls should be generated.

I say nothing about cases of unlikeness.