THERE IS ONLY ONE KIND OF QUALITY; OF WHICH CAPACITY AND DISPOSITION PARTAKE.
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Plotinus and Guthrie, Kenneth Sylvan
11. If this be so, why should we recognize several kinds of qualities? Why should we distinguish capacity and disposition? Whether quality be durable or not, it is always the same; for any kind of a disposition is sufficient to constitute a quality; permanence, however, is only an accident, unless it should be held that simple dispositions are imperfect forms, and that capacities are perfect forms. But if these forms be imperfect, they are not qualities; if they be already qualities, permanence is but an accident.