The prerequisite of originality is the art of forgetting, at the proper moment, what we know.
Arthur Koestler

The more original a discovery, the more obvious it seems afterwards.
Arthur Koestler

Nothing is more sad than the death of an illusion.
Arthur Koestler

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.
Arthur Koestler

The progress of science is strewn, like an ancient desert trail, with the bleached skeleton of discarded theories which once seemed to possess eternal life.
Arthur Koestler

A writer's ambition should be to trade a hundred contemporary readers for ten readers in ten years' time and for one reader in a hundred years' time.
Arthur Koestler

Creative activity could be described as a type of learning process where teacher and pupil are located in the same individual.
Arthur Koestler

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