[159] For if it is driven to and fro by appetite, or if it is attracted by pleasure, or turned out of the way by fear, or contracted by grief, or tortured by want, it then makes itself a slave, and makes him who possesses such a soul the slave of ten thousand masters. But if it has resisted and subdued ignorance by prudence, and intemperance by temperance, and cowardice by bravery, and covetousness by justice; it then adds to its indomitable free spirit, power and authority.