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.

Medicine is the restoration of discordant elements; sickness is the discord of the elements infused into the living body.

Iron rusts from disuse; water loses its purity from stagnation... even so does inaction sap the vigor of the mind.

He who can copy can do.

Learning is the only thing the mind never exhausts, never fears, and never regrets.

How painting surpasses all human works by reason of the subtle possibilities which it contains.

The knowledge of all things is possible