Page:O. F. Owen's Organon of Aristotle Vol. 1 (1853).djvu/49
In quality, there is also contrariety, as justice is contrary to injustice, and whiteness to blackness, and the like; also those things which subsist according to them are termed qualia, as the unjust to the just, and the white to the black. This however does not happen in all cases, for to the yellow, or the pale, or such like colours, though they are qualities, there is no contrary. Besides, if one contrary be a quality, the other, will also be a quality, and this is evident to any one considering the other categories. For instance, if justice be contrary to injustice, and justice be a quality, then injustice will also be a quality, for none of the other categories accords with injustice, neither quantity, nor relation, nor where, nor in short any thing of the kind, except quality, and the like also happens as to quality in the other contraries.