Enneads II.5: Of the Aristotelian Distinction Between Actuality and Potentiality
The Form Added to Matter Is the Specific Actuality
The name actuality would better suit the (general) actuality rather (than the actuality of some one thing); the actuality corresponding to the potentiality which brings a thing to actuality. Indeed, when that which was potential arrives at actuality, it owes the latter to something else.[20]
WHAT IN THE BODY IS A PASSIVE CAPACITY, IN THE SOUL IS AN ACTIVE FACULTY.
As to the potentiality which by itself produces that of which it is potentiality, that is, which produces the actuality (corresponding to this potentiality), it is a (Stoic) "habituation;" while the actuality (which corresponds to this habituation) owes its name thereto; for instance, the "habituation" is courageousness; while the actuality is being brave.[21] But enough of this!