Temperance and bravery, then, are ruined by excess and deficiency, but preserved by the mean.
AristotleMoney was intended to be used in exchange, but not to increase at interest. And this term interest, which means the birth of money from money, is applied to the breeding of money because the offspring resembles the parent. Wherefore of all modes of getting wealth this is the most unnatural.
AristotleBut what is happiness? If we consider what the function of man is, we find that happiness is a virtuous activity of the soul.
AristotleThe virtue of a faculty is related to the special function which that faculty performs. Now there are three elements in the soul which control action and the attainment of truth: namely, Sensation, Intellect, and Desire. Of these, Sensation never originates action, as is shown by the fact that animals have sensation but are not capable of action.
Aristotle