Perspective is nothing more than a rational demonstration applied to the consideration of how objects in front of the eye transmit their image to it, by means of a pyramid of lines. The Pyramid is the name I apply to the lines which, starting from the surface and edges of each object, converge from a distance and meet in a single point.

Being engulfed in practice without delicate knowledge related to it, is in many ways like entering a ship without knowing where it is headed.

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

Why does the eye see a thing more clearly in dreams than the imagination when awake?

A life well used procures a happy death.

Truth is so excellent, that if it praises but small things they become noble.

Those who fall in love with practice without science are like a sailor who enters a ship without a helm or a compass, and who never can be certain whither he is going.