Stoicism is a philosophy grounded in the belief that virtue, or excellence of character, is the highest good in life. The happiness valued in Stoicism is eudaimonia (you-dye-mo-NEE-ah), a Greek word meaning personal flourishing, wellbeing, or a life worth living. 

Eudaimonia may be unlocked when we practice the four Stoic virtues of wisdom, justice, temperance, and courage to guide our decisions. Rather than relying on things generally seen as forming the basis of happiness such as wealth, health, and status, Stoicism regards these things as having value when used wisely, but on their own unnecessary for happiness.