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

Beauty is the adjustment of all parts proportionately so that one cannot add or subtract or change without impairing the harmony of the whole.

No art, however minor, demands less than total dedication if you want to excel in it.

It seems obvious that colors vary according to lights, because when any color is placed in the shade, it appears to be different from the same color which is located in light. Shade makes color dark, whereas light makes color bright where it strikes.

A common error of ignorance is to maintain that what one does not know does not exist.

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

I would have artists be convinced that the supreme skill and art in painting consists in knowing how to use black and white... because it is light and shade that make objects appear in relief.

A man can do all things if he will.

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

It is very rarely granted even to Nature herself to produce anything absolutely perfect in every part.