A single and distinct luminous body causes stronger relief in the objects than a diffused light; as may be seen by comparing one side of a landscape illuminated by the sun, and one overshadowed by clouds, and illuminated only by the diffused light of the atmosphere.

Movement will fail sooner than usefulness.

The truth of things is the chief nutriment of superior intellects.

The deeper the feeling, the greater the pain

The first object of the painter is to make a flat plane appear as a body in relief and projecting from that plane

A clever man without wisdom is like a beautiful flower without fragrance.

A man of supreme folly: his life flies away while he is merely hoping to enjoy it.