Putting your hand into a river, you simultaneously touch the last of what is passing and the first of what is coming.

The good painter must paint two things: a person and the essence of his soul.

He who does not understand the supreme certainty of mathematics is wallowing in confusion.

I woke up only to find the rest of the world asleep.

The boundaries of bodies are the least of all things.

Though I may not . . . be able to quote other authors, I shall rely on that which is much greater and more worthy - on experience.

After painting comes Sculpture, a very noble art, but one that does not in the execution require the same supreme ingenuity as the art of painting, since in two most important and difficult particulars, in foreshortening and in light and shade, for which the painter has to invent a process, sculpture is helped by nature. Moreover, Sculpture does not imitate color which the painter takes pains to attune so that the shadows accompany the lights.