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.

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

I detest war; it ruins conversation

I hate war, for it spoils conversation.

People almost always do great things without knowing how to do them, and are quite surprised to have done them.

I have lived one hundred years; and I die with the consolation of never having thrown the slightest ridicule upon the smallest virtue.

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.