The chief good he has defined to be the exercise of virtue in a perfect life.
That virtue was sufficient of herself for happiness.
One ought to seek out virtue for its own sake, without being influenced by fear or hope, or by any external influence. Moreover, that in that does happiness consist.
He used to define justice as a virtue of the soul distributing that which each person deserved.
Once he saw a youth blushing, and addressed him, Courage, my boy! that is the complexion of virtue.