Not to anticipate is already to moan.

O painter skilled in anatomy, beware lest the undue prominence of the bones, sinews and muscles cause you to become a wooden painter from the desire to make your nude figures reveal all.

He turns not back who is bound to a star.

Principles for the Development of a Complete Mind: Study the science of art. Study the art of science. Develop your senses- especially learn how to see. Realize that everything connects to everything else.

Feathers shall raise men even as they do birds towards heaven :- That is by letters written with their quills.

Necessity is the mistress and guide of nature.

Learning is the only thing that never disappoints us.