Affective gestures pointing to things near either in time or space should be made with the hand not very far from the body of the person pointing; and if these things are distant, the hand of the painter should be more extended and the face turned toward the person to whom he is addressing the demonstration.

The eye - which sees all objects reversed - retains the images for some time.

The greatest geniuses sometimes accomplish more when they work less.

If you cause your ship to stop and place the head of a long tube in the water and place the outer extremity to your ear, you will hear ships at a great distance from you.

Who would believe that so small a space could contain the images of all the universe?

Painting is concerned with the ten things you can see: these are darkness and brightness, substance and color, form and place, remoteness and nearness, movement and rest.

We, by our arts may be called the grandsons of God.