Passivity, while it lasts, is not a quality but a motion; when it is a past experience remaining in one’s possession, it is a quality; if one ceases to possess the experience then regarded as a finished occurrence, one is considered to have been moved — in other words, to have been in Motion. But in none of these cases is it necessary to conceive of anything but Motion; the idea of time should be excluded; even present time has no right to be introduced.
“Well” and similar adverbial expressions are to be referred to the single generic notion [of Quality].
It remains to consider whether blushing should be referred to Quality, even though the person blushing is not included in this category. The fact of becoming flushed is rightly not referred to Quality; for it involves passivity — in short, Motion. But if one has ceased to become flushed and is actually red, this is surely a case of Quality, which is independent of time. How indeed are we to define Quality but by the aspect which a substance presents? By predicating of a man redness, we clearly ascribe to him a quality.
We shall accordingly maintain that states alone, and not dispositions, constitute qualities: thus, “hot” is a quality but not “growing hot,” “ill” but not “turning ill.”