There is nothing insignificant in the world. It all depends on how one looks at it.

I do not know myself, and God forbid that I should.

There are men who never err, because they never propose anything rational.

Everything is both simpler than we can imagine and more entangled than we can conceive.

First let a man teach himself, and then he will be taught by others.

Die Mathematiker sind eine Art Franzosen. Spricht man zu ihnen, so übersetzen sie alles in ihre eigene Sprache, und so wird es alsobald etwas ganz anderes. Mathematicians are a kind of Frenchmen. Whenever you say anything or talk to them, they translate it into their own language, and right away it is something completely different.

I had rather be Mercury, the smallest among seven [planets], revolving round the sun, than the first among five [moons] revolving round Saturn.