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

Every action needs to be prompted by a motive. To know and to will are two operations of the human mind. Discerning, judging, deliberating are acts of the human mind.

Every now and then go away, have a little relaxation, for when you come back to your work your judgment will be surer.

In rivers, the water that you touch is the last of what has passed and the first of that which comes; so with present time.

Sculptured figures which appear in motion, will, in their standing position, actually look as if they were falling forward.

Black is like a broken vessel, which is deprived of the capacity to contain anything.

The cat is nature's masterpiece.