Temperance is the ability to control your base urges; anger, hunger, jealousy, etc. It is the ability not to act. Moderation, self-control, etc., and related virtues. Temperance is represented by a harp because, like a harp, temperance is the art of keeping your passions in proper tension. If you have temperance, you are in harmony with yourself. If you let one of your passions control you, let’s say your anger, then you will get out of tune and become less happy. If you control your temper you have the peaceful harmony of self-mastery.