Happiness, therefore, being found to be something final; and self-sufficient, is the end at which all actions aim. - Aristotle

The most hated sort, and with the greatest reason, is usury, which makes a gain out of money itself, and not from the natural object of it. For money 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.

By this, then, we will know both what we ought to subtract from the person who has the greater share and what we ought to add to him who has the lesser: we ought to add that which exceeds the middle term to the person with the lesser, and to subtract from the one who has the greatest that by which the middle term is exceeded. The lines αα′, ββ′, γγ′ beingequal to one another, subtract from αα′ the part αε and add it to γγ′ as part, so that the whole, δγγ′, exceeds εα′ by δγ and γζ, and hence ββ′ by δγ.18

Hence while in respect of its substance and the definition that states what it really is in essence virtue is the observance of the mean, in point of excellence and rightness it is an extreme.