But to me all sciences seem vain and full of error that are not born of experience, mother of all certainty, and do not terminate in an actual experience.
Leonardo da VinciO painter skilled in anatomy, beware lest the undue prominence of the bones, sinews and muscles cause you to become a wooden painter from the desire to make your nude figures reveal all.
Leonardo da VinciWhen Fortune comes, seize her in front with a sure hand, because behind she is bald.
Leonardo da Vinci