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

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.

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.

Courage is never to let your actions be influenced by your fears.

The definition of the individual was: a multitude of one million divided by one million.

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.

I believe that the evidence for telepathy is overwhelming and that it is a part of reality that is above science. Science allows us to glimpse [only] fragments of reality.