Sculptured figures which appear in motion, will, in their standing position, actually look as if they were falling forward.

The function of muscle is to pull and not to push, except in the case of the genitals and the tongue.

King of the animals — as thou hast described him — I should rather say king of the beasts, thou being the greatest — because thou hast spared slaying them, in order that they may give thee their children for the benefit of the gullet, of which thou hast attempted to make a sepulchre for all animals; and I would say still more, if it were allowed me to speak the entire truth.

Many have made a trade of delusions and false miracles, deceiving the stupid multitudes.

Art is the queen of all sciences communicating knowledge to all the generations of the world.

The color of the object illuminated partakes of the color of that which illuminates it.

Every now and then go away, have a little relaxation, for when you come back to your work your judgment will be surer.