'Wars, factions, and fighting,' said Socrates as he looked forward from his last hour, 'have no other origin than this same body and its lusts... We must set the soul free from it; we must behold things as they are. And having thus got rid of the foolishness of the body, we shall be pure and hold converse with the pure, and shall in our own selves have complete knowledge of the Incorruptible which is, I take it, no other than the very truth.

I am a citizen, not of Athens, or Greece, but of the world.

I know what I do not know.

To them, I said, the truth would be literally nothing but the shadows of the images.

The understanding of mathematics is necessary for a sound grasp of ethics.

Anybody can be a hellene, by his heart, his mind, his spirit.

I am very conscious that I am not wise at all.