II. The World Conception of the Greek Thinkers

What Plato has to say about the moral life follows from this soul conception. The soul is moral if it so arranges life that it exerts itself to the largest possible measure as rational soul. Wisdom is the virtue that stems from the rational soul; it ennobles human life. Fortitude is the virtue of the will-exertive soul; Temperance is that of the appetitive soul. These virtues come to pass when the rational soul becomes the ruler over the other manifestations of the soul. When all three virtues harmoniously act together, there emerges what Plato calls, Justice, the direction toward the Good, Dikaiosyne.