Enneads II.6: Of Essence and Being
Second Ennead, Book Six
1. Is "essence" something different from "being"? Does essence indicate an abstraction of the other (four categories), and is being, on the contrary, essence with the other (four categories), motion and rest, identity and difference? Are these the elements of being? Yes: "being" is the totality of these things, of which one is essence, the other is motion, and so forth. Motion, therefore, is accidental essence. Is it also accidental "being?" Or is it being completely? Motion is being, because all intelligible things are beings. But why is not each of the sense-things a being? The reason is, that on high all things form only a single group of totality, while here below they are distinct one from another because they are images that have been distinguished. Likewise, in a seminal (reason), all things are together, and each of them is all the others; the hand is not distinct from the head; while, on the contrary, in a body all the organs are separate, because they are images instead of being genuine beings.
We may now say that, in the intelligible world, qualities are the characteristic differences in being or essence. These differences effect distinction between the beings; in short, they cause them to be beings. This definition seems reasonable. But it does not suit the qualities below (in the sense-world); some are differences of being, as biped, or quadruped (as thought Aristotle);[330] others are not differences, and on that very account are called qualities. Still, the same thing may appear a difference when it is a complement of the being, and again it may not seem a difference when it is not a complement of the being, but an accident: as, for instance, whiteness is a complement of being in a swan, or in white lead; but in a human being like you, it is only an accident (as thought Aristotle).[331] So long as the whiteness is in the ("seminal) reason," it is a complement of being, and not a quality; if it be on the surface of a being, it is a quality.