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

The function of muscle is to pull and not to push, except in the case of the genitals and the tongue.

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

Men wrongly lament the flight of time, blaming it for being too swift; they do not perceive that its passage is sufficiently long, but a good memory, which nature has given to us, causes things long past to seem present.

Who would believe that so small a space could contain the images of all the universe?

Nature never breaks her own laws.

There is no higher or lower knowledge, but one only, flowing out of experimentation.