One should respect an honest person even if he expresses opinions differing from one's own.
Albert EinsteinPeople are like bicycles. They can keep their balance only as long as they keep moving.
Albert EinsteinConcepts which have proved useful for ordering things easily assume so great an authority over us, that we forget their terrestrial origin and accept them as unalterable facts. They then become labeled as 'conceptual necessities,' etc. The road of scientific progress is frequently blocked for long periods by such errors.
Albert EinsteinWhile I am a convinced pacifist there are circumstances in which I believe the use of force is appropriate - namely, in the face of an enemy unconditionally bent on destroying me and my people.
Albert Einstein