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.

Some of the greatest discoveries...consist mainly in the clearing away of psychological roadblocks which obstruct the approach to reality; which is why,post factum they appear so obvious.

The temptations of God were always more dangerous for mankind than those of Satan.

The ultimate truth is penultimately always a falsehood. He who will be proved right in the end appears to be wrong and harmful before it.

Most of us were not afraid of death, only of the act of dying; and there were times when we overcame even this fear. At such moments we were free-men without shadows, dismissed from the ranks of the mortal; it was the most complete experience of freedom that can be granted a man.

Creativity is the defeat of habit by originality.

Nothing is more sad than the death of an illusion.