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.

Feathers shall raise men even as they do birds towards heaven :- That is by letters written with their quills.

Nature never breaks her own laws.

Who sows virtue ought to reap honour.

The eye is the window of the human body through which it feels its way and enjoys the beauty of the world.

Experience never misleads; what you are misled by is only your judgment, and this misleads you by anticipating results from experience of a kind that is not produced by your experiments.

I abhor the supreme folly of those who blame the disciples of nature in defiance of those masters who were themselves her pupils