The Medici created and destroyed me.

Just as a well-filled day brings blessed sleep, so a well-employed life brings a blessed death.

Small rooms or dwellings set the mind in the right path, large ones cause it to go astray.

When you are alone you are all your own.

I say that the power of vision extends through the visual rays to the surface of non-transparent bodies, while the power possessed by these bodies extends to the power of vision.

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.

Every part is disposed to unite with the whole, that it may thereby escape from its own incompleteness.