The deeper the feeling, the greater the pain

The supreme misfortune is when theory outstrips performance

Nothing is more apt to deceive us than our own judgment of our work. We derive more benefit from having our faults pointed out by our enemies than from hearing the opinions of friends.

Those who become enamoured of the art, without having previously applied to the diligent study of the scientific part of it, may be compared to mariners who put to the sea in a ship without rudder or compass and therefore cannot be certain of arriving at the wished for port.

O Time with your teethy years! You swallow up all things little by little in a slow-motion, wrinkling process of dying.

Perspective is the rein and rudder of painting.

He who truly knows has no occasion to shout.