We are thus led to ask how a being can be composed of non-beings? It has already been pointed out that the things subject to generation could not be identical with the principles from which they proceed. Let us now add that they could not be beings. But still, how can one say that the intelligible being is constituted by a non-being? The reason is that in the intelligible world since being forms a purer and more refined essence, being really is somehow constituted by the differences of essence; or rather, we feel it ought to be called being from considering it together with its energies (or, actualizations). This being seems to be a perfecting of essence; but perhaps being is less perfect when it is thus considered together with its actualizations; for, being less simple, it veers away from essence.
SUCHNESS IS LATER THAN BEING AND QUIDDITY.
2. Let us now consider what quality in general is; for when we shall know this, our doubts will cease. First, must it be admitted that one and the same thing is now a quality, and then a complement of being? Can one say that quality is the complement of being, or rather of such a being? The suchness of being implies a previously existing being and quiddity.
BEING CANNOT PRECEDE SUCH BEING.
Taking the illustration of fire, is it "mere being" before it is "such being?" In this case, it would be a body. Consequently, the body will be a being; fire will be a hot body. Body and heat combined will not constitute being; but heat will exist in the body as in you exists the property of having a stub nose (as said Aristotle).[333] Consequently, if we abstract heat, shine and lightness, which seem to be qualities, and also impenetrability, nothing will remain but tridimensional extension, and matter will be "being." But this hypothesis does not seem likely; it is rather form which will be "being."
FORM IS NOT A QUALITY; BUT A REASON.
Is form a quality? No: form is a reason. Now what is constituted by (material) substance, and reason? (In the warm body) it is neither what burns, nor what is visible; it is quality. If, however, it be said that combustion is an act emanating from reason, that being hot and white are actualities, we could not find anything to explain quality.
QUALITIES ARE ACTS OF BEING, PROCEEDING FROM REASONS AND ESSENTIAL POTENTIALITIES.
What we call a complement of being should not be termed a quality, because they are actualizations of being, actualizations which proceed from the reasons and the essential potentialities. Qualities are therefore something outside of being; something which does not at times seem to be, and at other times does not seem not to be qualities; something which adds to being something that is not necessary; for example, virtues and vices, ugliness and beauty, health, and individual resemblance. Though triangle, and tetragon, each considered by itself, are not qualities; yet being "transformed into triangular appearance" is a quality; it is not therefore triangularity, but triangular formation, which is a quality. The same could be said of the arts and professions. Consequently, quality is a disposition, either adventitious or original, in already existing beings. Without it, however, being would exist just as much. It might be said that quality is either mutable or immutable; for it forms two kinds, according to whether it be permanent or changeable.