For me, my thoughts are my prostitutes.

I like better for one to say some foolish thing upon important matters than to be silent. That becomes the subject of discussion and dispute, and the truth is discovered.

We swallow with one gulp the lie that flatters us, and drink drop by drop the truth which is bitter to us.

Anyone who takes it upon himself, on his private authority, to break a bad law, thereby authorizes everyone else to break the good ones.

Time, matter, space - all, it may be, are no more than a point.

In order to get as much fame as one's father one has to much more able than he.

Philosophy is as far separated from impiety as religion is from fanaticism.