Chemically induced hallucinations, delusions and raptures may be frightening or wonderfully gratifying; in either case they are in the nature of confidence tricks played on one's own nervous system.

True creativity often starts where language ends.

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

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

Politics can be relatively fair in the breathing spaces of history; at its critical turning points there is no other rule possible than the old one, that the end justifies the means.

Creativity is a type of learning process where the teacher and pupil are located in the same individual.

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.