Learning is the only thing that never disappoints us.

When the sun is covered by clouds, objects are less conspicuous, because there is little difference between the light and shade of the trees and the buildings being illuminated by the brightness of the atmosphere which surrounds the objects in such a way that the shadows are few, and these few fade away so that their outline is lost in haze.

We must doubt the certainty of everything which passes through the senses, but how much more ought we to doubt things contrary to the senses, such as the existence of God and the soul.

The five senses are the ministers of the soul.

Nature is constrained by the cause of her laws which dwell inborn in her. Variant: Nature is constrained by the order of her own law which lives and works within her.

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

The discovery of a good wine is increasingly better for mankind than the discovery of a new star.