We know that virtue does not matter to history, and that crimes remain unpunished; but that every error had its consequences and venges itself unto the seventh generation.

The inner censor of the mind of the true believer completes the work of the public censor; his self-discipline is as tyrannical as the obedience imposed by the regime; he terrorizes his own conscience into submission;he carries his private Iron Curtain inside his skull, to protect his illusions against the intrusion of reality.

One should either write ruthlessly what one believes to be the truth, or else shut up.

The moment of truth, the sudden emergence of a new insight, is an act of intuition. Such intuitions give the appearance of miraculous flushes, or short-circuits of reasoning. In fact they may be likened to an immersed chain, of which only the beginning and the end are visible above the surface of consciousness. The diver vanishes at one end of the chain and comes up at the other end, guided by invisible links.

Faith is a wondrous thing; it is not only capable of moving mountains, but also of making you believe that a herring is a race horse.

Somebody once asked Niels Bohr why he had a horseshoe hanging above the front door of his house. Surely you, a world famous physicist, can't really believe that hanging a horseshoe above your door brings you luck? Of course not, Bohr replied, but I have been reliably informed that it will bring me luck whether I believe in it or not.

...the temptation, which consisted of a single word written on the cemetary of the defeated: Sleep.