We’re neither pure, nor wise, nor good; we do the best we know.

There are truths which are not for all men, nor for all times.

He who has heard the same thing told by 12,000 eye-witnesses has only 12,000 probabilities, which are equal to one strong probability, which is far from certain.

If there’s life on other planets, then the earth is the Universe’s insane asylum.

Let us leave every man at liberty to seek into him and to lose himself in his ideas.

Anyone who seeks to destroy the passions instead of controlling them is trying to play the angel.

I believe that there never was a creator of a philosophical system who did not confess at the end of his life that he had wasted his time. It must be admitted that the inventors of the mechanical arts have been much more useful to men that the inventors of syllogisms. He who imagined a ship towers considerably above him who imagined innate ideas.