I learned long ago, never to wrestle with a pig. You get dirty, and besides, the pig likes it.

It is dangerous to be sincere unless you are also stupid.

Audacious ribald: your laughter will finish in hideous boredom before morning.

We are more gullible and superstitious today than we were in the Middle Ages, and an example of modern credulity is the widespread belief that the Earth is round. The average man can advance not a single reason for thinking that the Earth is round. He merely swallows this theory because there is something about it that appeals to the twentieth century mentality.

Every man deserves to be judged in the context of his times.

If you cannot attain knowledge without torturing a dog, you must do without knowledge.

No doubt it is easy to demostrate that property will destroy society unless society destroys it.