What shall be said of thickness and thinness, of fatness and leanness? If the element common to these conceptions be a power belonging to the capacities, dispositions, and physical powers, which gives to each object the power it possesses, the statements of the absence of power will no longer be classified along with (the powers). Besides, in what sense can we call the figure and form of each thing a "power?" Further, essence would have been deprived of all powers that were essential, retaining only those it might have received. Then, quality would comprehend all actualizations of the beings, which, properly, are actualizations only so far as they act spontaneously; and also all actualizations of these properties, but only so far as they really exist. But quality consists in (unessential) powers (such as habituations and dispositions) classified below beings.[263] For instance, boxing ability does not belong among necessary human qualifications, such as rational functions. The latter would not be called a quality (as we would speak of boxing ability); and reasoning would be considered a quality only figuratively.
MERE DIFFERENTIALS OF BEINGS ARE NOT GENUINE QUALITIES.
A quality is therefore a power which adds (essential) characteristics to already existing beings. These characteristics which differentiate beings can therefore be called qualities only figuratively. Qualities are, rather, actualizations and reasons, or parts of reasons, which proclaim the "whatness," though the latter seem to qualify being. As to the qualities which really deserve this name, which "qualify" things, which we generally call "potentialities," they are the reasons and shapes, either of the soul or the body, such as beauty or ugliness.[264]
NOT ALL QUALITIES ARE REASONS.
How can all qualities be potentialities? It is easy to see that beauty and health are qualities. But how could ugliness and sickness, weakness and general impotence, be qualities? Is it because they qualify certain things? But what hinders the qualified things from being called such by mere nomenclature, as homonyms, and not because of a single (all-sufficient) reason? Besides, what would hinder them from being considered not only according to one of the four modes,[265] but even after each one of the four, or at least after any two of them? First, the quality does not consist in "acting" and "experiencing";[266] so that it is only by placing oneself at different viewpoints that one could call what "acts" and "experiences" a quality, in the same sense as health and sickness, disposition and habitude, force and weakness. Thus power is no longer the common element in these qualities, and we shall have to seek something else possessing this characteristic, and the qualities will no longer all be reasons. How indeed could a sickness, become a habituation, or be a reason?
QUALITY IS NOT A POWER BUT DISPOSITION, FORM AND CHARACTER.
Shall the affections which consist in the forms and powers, and their contraries, the privations, be called qualities?[267] If so, one kind will no longer exist; and we shall have to reduce these things to a unity, or category; that is why knowledge is called a form and a power, and ignorance a privation and impotence. Must we also consider impotence and sickness a form, because sickness and vice can and do accomplish many things badly? Not so, for in this case he who missed his aim would be exerting a power. Each one of these things exerts its characteristic activity in not inclining towards the good; for it could not do what was not in its power. Beauty certainly does have some power; is it so also with triangularity? In general, quality should not be made to consist in power, but rather in the disposition, and to consider it as a kind of form of character. Thus the common element in all qualities is found to be this form, this classification, which no doubt is inherent in being, but which certainly is derivative from it.
QUALITY CONSISTS IN A NON-ESSENTIAL CHARACTER.
What part do the powers (or, potentialities) play here? The man who is naturally capable of boxing owes it to a certain disposition. It is so also with somebody who is unskilful in something. In general, quality consists in a non-essential characteristic; what seems to contribute to the being, or to add to it, as color, whiteness, and color in general, contributes to the beings as far as it constitutes something distinct therefrom, and is its actualization; but it occupies a rank inferior to being; and though derived therefrom, it adds itself thereto as something foreign, as an image and adumbration.