The eye which turns from a white object in the light of the sun and goes into a less fully lighted place will see everything as dark.

He who draws... ought to take his position so that the eye of the figure he is drawing is on a level with his own... because, generally, figures or people whom you meet in the streets all have their eyes at the same level as yours, and if you make them higher or lower you will find that your portrait will not resemble them.

The eye is the window of the human body through which it feels its way and enjoys the beauty of the world.

The worst evil which can befall the artist is that his work should appear good in his own eyes.

The soul is content to stay imprisoned in the human body... for through the eyes all the various things of nature are represented to the soul.