An educated mind is, as it were, composed of all the minds of preceding ages.

I feel nothing, apart from a certain difficulty in continuing to exist.

Behold a universe so immense that I am lost in it. I no longer know where I am. I am just nothing at all. Our world is terrifying in its insignificance.

Our sun enlightens the planets that belong to him; why may not every fixed star also have planets to which they give light?

I detest war; it ruins conversation

There is nothing one sees oftener than the ridiculous and magnificent, such close neighbors that they touch.

Mathematicians are like lovers. Grant a mathematician the least principle, and he will draw from it a consequence which you must also grant him, and from this consequence another.