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

A philospher sees the Earth as a large planet, travelling through the heavens, covered with fools

Women react differently: a French woman who sees herself betrayed by her husband will kill his mistress; an Italian will kill her husband; a Spaniard will kill both; and a German will kill herself.

Nothing can be more destructive to ambition, and the passion for conquest, than the true system of astronomy. What a poor thing is even the whole globe in comparison of the infinite extent of nature!

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

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

A philosopher will not believe what he sees because he is too busy speculating about what he does not see.