Wisdom is the daughter of experience
For those colours which you wish to be beautiful, always first prepare a pure white ground.
The good painter must paint two things: a person and the essence of his soul.
Human subtlety will never devise an invention more beautiful, more simple or more direct than does nature because in her inventions nothing is lacking, and nothing is superfluous.
The greatest geniuses sometimes accomplish more when they work less.
The eye, the window of the soul, is the chief means whereby the understanding can most fully and abundantly appreciate the infinite works of Nature; and the ear is second.