Aristotle

“ For many declare happiness to be identical with good luck.
That men, then, possess happiness through all or some of these causes is evident; for practically all new creations come under these principles—for all acts arising from intelligence may be included among acts that arise from knowledge. Now to be happy, to live blissfully and beautifully, must consist mainly in three things, which seem most desirable; for some say prudence1 is the greatest good, some virtue, and some pleasure. ”

“ I The man who stated his judgement in the god's precinct in Delos made an inscription on the propylaeum to the temple of Leto, in which he separated from one another the good, the beautiful, and the pleasant as not all properties of the same thing; he wrote, 'Most beautiful is what is most just, but best is health, and pleasantest the obtaining of what one desires.' But let us disagree with him; for happiness is at once the most beautiful and best of all things and also the pleasantest. ”

“ But first we must consider in what the happy life consists and how it is to be acquired, whether all who receive the epithet 'happy' become so by nature (as we become tall, short, or of different complexions) , or by teaching (happiness being a sort of science) , or by some sort of discipline—for men acquire many qualities neither by nature nor by teaching but by habituation, bad qualities if they are habituated to the bad, good if to the good. ”