But whatever is virtuous arises from some one of those four divisions: for it consists either in sagacity and the perception of truth ; or in the preservation of human society, by giving to every man his due, and by observing the faith of contracts ; or in the greatness and firmness of an elevated and unsubdued mind ; or in observing order and regularity in all our words and in all our actions, in which consists moderation and temperance (Cicero, De Officiis).