Those who are in love with practice without knowledge are like the sailor who gets into a ship without rudder or compass and who never can be certain whether he is going. Practice must always be founded on sound theory, and to this Perspective is the guide and the gateway; and without this nothing can be done well in the matter of drawing.

Be a mirror, absorb everything around you and still remain the same

My body is not a tomb for animals.

A well-spent day brings happy sleep.

You can have no dominion greater or less than that over yourself.

The eye encompasses the beauty of the whole world.

Truth was always but the daughter of time.