[SECOND ENNEAD, BOOK SIX.]
Of Essence and Being.
DISTINCTION BETWEEN ESSENCE AND BEING.
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.
DISTINCTION BETWEEN COMPLEMENTS OF BEING, AND QUALITIES.
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.
DISTINCTION BETWEEN ESSENTIAL AND MODAL QUALITIES.
Two kinds of qualities must be distinguished; the essential quality, which is a peculiarity of its being, and the mere quality, which affects the being's classification. The mere quality introduces no change in the essence, and causes none of its characteristics to disappear; but, when the being exists already, and is complete, this quality gives it a certain exterior disposition; and, whether in the case of a soul or body, adds something to it. Thus visible whiteness, which is of the very being of white lead, is not of the being of the swan, because a swan may be of some color other than white. Whiteness then completes the being of white lead, just as heat completes the being of fire. If igneousness is said to be the being of fire, whiteness is also the being of white lead. Nevertheless, the igneousness of the visible fire is heat, which constitutes the complement of its being; and whiteness plays the same part with respect to white lead. Therefore (differing according to the difference of various beings) the same things will be complements of being, and will not be qualities, or they will not be complements of being, and will be qualities; but it would not be reasonable to assert that these qualities are different according to whether or not they are complements of being, since their nature is the same.
DISTINCTION BETWEEN WHATNESS AND AFFECTIONS OF BEING.
We must acknowledge that the reasons which produce these things (as heat, and whiteness) are beings, if taken in their totality; but on considering their production, we see that what constitutes a whatness or quiddity (the Aristotelian "what it were to be") in the intelligible world, becomes a quality in the sense-world. Consequently, we always err on the subject of the quiddity, when we try to determine it, mistaking the simple quality for it (as thought Plato),[332] for, when we perceive a quality, the fire is not what we call fire, but a being. As to the things which arrest our gaze, we should distinguish them from the quiddity, and define them by the qualities of sense (objects); for they do not constitute the being, but the affections of being.