Good is a Balance Between Opposite Evils

"For Aristotle, [...] virtue lay in the mean between two extremes. Good is always a balance between two opposite evils, the midpoint between excess and defect. Temperance is a mean between austerity and indulgence. Courage, a mean between cowardice and foolhardiness. Proper pride a mean between arrogance and abasement, and so forth. Such a mean can only be found in practice."

Richard Tarnas, from The Passion of the Western Mind