..., twice two is four is not life, gentlemen, but the beginning of death.

Don’t be overwise; fling yourself straight into life, without deliberation; don’t be afraid - the flood will bear you to the bank and set you safe on your feet again.

Here is a commandment for you: seek happiness in sorrow. Work, work tirelessly.

You can't be angry with me, because I am a hundred times more severely punished than you, if only by the fact that I shall never see you again.

But twice-two-makes-four is for all that a most insupportable thing. Twice-two-makes-four is, in my humble opinion, nothing but a piece of impudence. Twice-two-makes-four is a farcical, dressed-up fellow who stands across your path with arms akimbo and spits at you.

Above all, do not lie to yourself.

How many ideas have there been in the history of man which were unthinkable ten years before they appeared?