Paradoxes are the only truths.

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

Oh, the frontier of hell and heaven is only the difference between two ways of looking at things.

A learned man is an idler who kills time by study.

It is difficult, if not impossible, for most people to think otherwise than in the fashion of their own period.

When a thing is funny, search it carefully for a hidden truth.

I can forgive Alfred Nobel for having invented dynamite, but only a fiend in human form could have invented the Nobel Prize.