Excellence or virtue is a settled disposition of the mind that determines our choice of actions and emotions and consists essentially in observing the mean relative to us ... a mean between two vices, that which depends on excess and that which depends on defect.
AristotleThe chief forms of beauty are order and symmetry and definiteness, which the mathematical sciences demonstrate in a special degree.
AristotleWe have divided the Virtues of the Soul into two groups, the Virtues of the Character and the Virtues of the Intellect.
AristotleTherefore the good man ought to be a lover of self, since he will then both benefit himself by acting nobly and aid his fellows; but the bad man ought not to be a lover of self, since he will follow his base passions, and so injure both himself and his neighbors. With the bad man therefore, what he does is not in accord with what he ought to do, but the good man does what he ought, since intelligence always chooses for itself that which is best, and the good man obeys his intelligence.
Aristotle