The vigorous are no better than the lazy during one half of life, for all men are alike when asleep.

In part, art completes what nature cannot elaborate; and in part it imitates nature.

The saying of Protagoras is like the views we have mentioned; he said that man is the measure of all things, meaning simply that that which seems to each man assuredly is. If this is so, it follows that the same thing both is and is not, and is bad and good, and that the contents of all other opposite statements are true, because often a particular thing appears beautiful to some and ugly to others, and that which appears to each man is the measure

By 'life,' we mean a thing that can nourish itself and grow and decay.

If then, as we say, good craftsmen look to the mean as they work, and if virtue, like nature, is more accurate and better than any form of art, it will follow that virtue has the quality of hitting the mean. I refer to moral virtue [not intellectual], for this is concerned with emotions and actions, in which one can have excess or deficiency or a due mean.

Nothing in life is more necessary than friendship.

A true friend is one soul in two bodies.