Perspective is to painting what the bridle is to the horse, the rudder to a ship.

Sculpture, a very noble art, is one that does not in the execution require the same supreme ingenuity as the art of painting, since in two most important and difficult particulars, in foreshortening and in light and shade... the painter has to invent a process, [whereas] sculpture is helped by nature.

It is better to imitate ancient than modern work.

Many are they who have a taste and love for drawing, but no talent; and this will be discernible in boys who are not diligent and never finish their drawings with shading.

There are three aspects to perspective. The first has to do with how the size of objects seems to diminish according to distance: the second, the manner in which colors change the farther away they are from the eye; the third defines how objects ought to be finished less carefully the farther away they are.

The great poet draws his creations only from out of his own reality.