Aristotle and the structure of the soul

“Of the non-rational [component of the soul], one part seems to be that which is held in common and vegetative—I mean that which causes nutrition and growth. For someone could posit that such a capacity of the soul is in all things that are nourished. …

A certain virtue belonging to this capacity, then, appears to be common and not distinctive of a human being. …

Yet there seems to be also a certain other nature of the soul that is non-rational, although it does share in reason in a way. For in th...