My internal and external life depend so much on the work of others that I must make an extreme effort to give as much as I receive.

An oligarchy of private capital cannot be effectively checked even by a democratically organized political society because under existing conditions, private capitalists inevitably control, directly or indirectly, the main sources of information.

I have just got a new theory of eternity.

True knowledge comes with deep understanding of a topic and its inner workings.

I think that only daring speculation can lead us further and not accumulation of facts.

Thus I came...to a deep religiosity, which, however, reached an abrupt end at the age of 12. Through the reading of popular scientific books I soon reached a conviction that much in the stories of the Bible could not be true....Suspicion against every kind of authority grew out of this experience...an attitude which has never left me.

To the extent math refers to reality, we are not certain to the extent we are certain, math does not refer to reality.