Letter 95 — On the Usefulness of Basic Principles (§55)

“Now let us turn to a consideration of the virtues. Some persons will advise us to rate prudence very high, to cherish bravery, and to cleave more closely, if possible, to justice than to all other qualities. But this will do us no good if we do not know what virtue is, whether it is simple or compound, whether it is one or more than one, whether its parts are separate or interwoven with one another; whether he who has one virtue possesses the other virtues also; and just what are the distinctions between them.”