As ability goes, so goes our fortune.

A man can do all things if he will.

I certainly consider a great appreciation of painting to be the best indication of a most perfect mind.

The Arts are learnt by reason and method; they are mastered by practice.

When I investigate and when I discover that the forces of the heavens and the planets are within ourselves, then truly I seem to be living among the gods.

It was never shameful to learn from any teacher things that are useful to know.

... the movements of the body reveal the movements of the soul.