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.

Those instrumental goods which should serve to maintain the life and health of all human beings should be produced by the least possible labour of all.

I never teach my pupils, I only attempt to provide the conditions in which they can learn.

I know quite certainly that I myself have no special talent; curiosity, obsession and dogged endurance, combined with self-criticism, have brought me to my ideas.

Nothing happens unless something moves.

As I have said so many times, God doesn't play dice with the world.

If the believers of the present-day religions would earnestly try to think and act in the spirit of the founders of these religions then no hostility on the basis of religion would exist among the followers of the different faiths. Even the conflicts and the realm of religion would be exposed as insignificant.