Nationalism is infantile sickness. It is the measles of the human race.

Reality is merely an illusion, albeit a very persistent one.

If my theory of relativity is proven correct, Germany will claim me as a German and France will declare that I am a citizen of the world. Should my theory prove untrue, France will say that I am a German and Germany will declare that I am a Jew.

If the facts don't fit the theory, change the facts

The most beautiful thing we can experience is the mysterious. It is the source of all true art and science.

If A is a success in life, then A equals x+y+z. Work is x; y is play; and z is keeping your mouth shut.

Make everything as simple as possible, but not simpler.

I never think of the future - it comes soon enough.

Science without religion is lame; religion without science is blind.

On receiving the one world award: I am greatly touched by the signal honour which you have wished to confer upon me. In the course of my long life, I have received from my fellow-men far more recognition than I deserve and I confess that my sense of shame has always weighed my pleasure therein. But never, on any previous occasion, has the pain so far outweighed the pleasure as now.

Common sense is the collection of prejudices acquired by age eighteen.

On Mahatma Gandhi: Generations to come, it maybe, will scarce believe that such a one as this ever in flesh and blood walked upon this earth.

I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.