and difficult to alter.

Habits are at the same time dispositions, but dispositions are
not necessarily habits. For those who have some specific habit
may be said also, in virtue of that habit, to be thus or thus
disposed; but those who are disposed in some specific way have
not in all cases the corresponding habit.

Another sort of quality is that in virtue of which, for example,
we call men good boxers or runners, or healthy or sickly: in fact
it includes all those terms which refer to inborn capacity or
incapacity. Such things are not predicated of a person in virtue
of his disposition, but in virtue of his inborn capacity or
incapacity to do something with ease or to avoid defeat of any
kind. Persons are called good boxers or good runners, not in
virtue of such and such a disposition, but in virtue of an inborn
capacity to accomplish something with ease. Men are called
healthy in virtue of the inborn capacity of easy resistance to
those unhealthy influences that may ordinarily arise; unhealthy,
in virtue of the lack of this capacity. Similarly with regard to
softness and hardness. Hardness is predicated of a thing because
it has that capacity of resistance which enables it to withstand
disintegration; softness, again, is predicated of a thing by
reason of the lack of that capacity.

A third class within this category is that of affective qualities
and affections. Sweetness, bitterness, sourness, are examples of
this sort of quality, together with all that is akin to these;
heat, moreover, and cold, whiteness, and blackness are affective
qualities. It is evident that these are qualities, for those