[50] Does any one therefore seek a just, or prudent, or temperate, or, in short, any perfectly good man, in this confused life? Be content if you find one who is not wholly unjust, or foolish, or intemperate, or cowardly, or who is not utterly worthless; for the avoidance of evil is a thing with which to be content, but [52] the complete acquisition of the virtues is unattainable to any man, such as is endowed with our nature.