 This solution helps to explain the strange predicative behavior of soul and its powers. It also, interestingly, provides us with a solution to what a potential part is: The soul turns out to be a quality composed in a fairly familiar sense of “composition” out of other qualities. The commentator thus attempts to explain the tricky notion of potential-parthood in terms of more understandable relations, namely, the predication relation and the relation of an integral part to its whole. 