I have made no secret, either privately or publicly, of any sense of outrage over officially enforced military and war service. I regard it as a duty of conscience to fight against such barbarous enslavement of the individual with every means available.

No amount of experimentation can ever prove me right; a single experiment can prove me wrong.

The content of scientific theory itself offers no moral foundation for the personal conduct of life.

Experience alone can decide on truth.

In my relativity theory I set up a clock at every point in space, but in reality I find it difficult to provide even one clock in my room.

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

I believe my theory of relativity to be true. But it will only be proved for certain in 1981, when I am dead.