As regards this vice, we read that the peacock is more guilty of it than any other animal. For it is always contemplating the beauty of its tail, which it spreads in the form of a wheel, and by its cries attracts to itself the gaze of the creatures that surround it. And this is the last vice to be conquered.

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

The organ of perception acts more readily than judgment.

Mechanics is the paradise of the mathematical sciences because by means of it one comes to the fruits of mathematics.

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.

All our knowledge has its origins in our perceptions.

You will never have a greater or lesser dominion than that over yourself.