To speak well of a base man is much the same as speaking ill of a good man.

Those who are enamoured of practice without science are like a pilot who goes into a ship without rudder or compass and never has any certainty of where he is going. Practice should always be based upon a sound knowledge of theory.

The painter's mind is a copy of the divine mind, since it operates freely in creating the many kinds of animals, plants, fruits, landscapes, countrysides, ruins, and awe-inspiring places.

Truth was always but the daughter of time.

Of several bodies, all equally large and equally distant, that which is most brightly illuminated will appear to the eye nearest and largest.

It's easier to resist at the beginning than at the end.

Men of genius sometimes accomplish most when they work least, for they are thinking out inventions.