Note 240 — SIXTH ENNEAD, BOOK ONE. Of the Ten Aristotelian and Four Stoic Categories.

Aristotle, Met. vii. 3, distinguished many different senses of Being; at least four principal ones: what it seems, or the universal, the kind, or the subject. The subject is that of which all the rest is an attribute, but which is not the attribute of anything. Being must be the first subject. In one sense this is matter; in another, form; and in the third place, the concretion of form and matter.