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

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

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.

Nothing is more sad than the death of an illusion.

Scientists are peeping toms at the keyhole of eternity.

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