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

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.

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.

There are three things I have loved but never understood. Art, music and women.

The Art of Flying is but newly invented, twill improve by degrees, and in time grow perfect; then we may fly as far as the Moon.

Leibniz never married; he had considered it at the age of fifty; but the person he had in mind asked for time to reflect. This gave Leibniz time to reflect, too, and so he never married.