Friendship is a thing most necessary to life, since without friends no one would choose to live, though possessed of all other advantages.

... the science we are after is not about mathematicals either none of them, you see, is separable.

Emotions of any kind can be evoked by melody and rhythm; therefore music has the power to form character.

Great men are always of a nature originally melancholy.

Sophocles said he drew men as they ought to be, and Euripides as they were.

Two characteristic marks have above all others been recognized as distinguishing that which has soul in it from that which has not - movement and sensation.

All virtue is summed up in dealing justly.