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.