The good, therefore, is not some common element answering to one Idea. But what then do we mean by the good? It is surely not like the things that only chance to have the same name. Are goods one, then, by being derived from one good or by all contributing to one good, or are they rather one by analogy? Certainly as sight is in the body, so is reason in the soul, [30] and so on in other cases. But perhaps these subjects had better be dismissed for the present; for perfect precision about them would