Idea
Virtue
The excellence of character. For the Greeks, virtue was not merely moral goodness but the fulfillment of one's nature, being what a human can be at its best.
Aretē is often translated as virtue, but it means something closer to excellence or being fully what you are. A knife has aretē when it cuts well. A person has aretē when they reason well, act justly, and live courageously. Socrates argued that virtue is knowledge. Aristotle said it is a habit. The Stoics believed it is the only thing that matters. The question of what makes a good life runs through every school of Greek thought.