The jester is brother to the sage.

Wars are not fought for territory, but for words. Man's deadliest weapon is language. He is as susceptible to being hypnotized by slogans as he is to infectious diseases. And where there is an epidemic, the group-mind takes over.

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.

The principle mark of genius is not perfection but originality, the opening of new frontiers.

When a chess player looks at the board, he does not see a static mosaic, a 'still life', but a magnetic field of forces, charged with energy - as Faraday saw the stresses surrounding magnets and currents as curves in space; or as Van Gogh saw vortices in the skies of Provence.

In any language it is a struggle to make a sentence say exactly what you mean.

Space-ships and time machines are no escape from the human condition.