To say of men that they are bad is to say they are worse than we think we are, or worse than the ideal man whose image we have built up on the basis of a certain few.

It may offend us to hear our own thoughts expressed by others: we are not sure enough of their souls.

Science has made us gods even before we are worthy of being men.

Certain brief sentences are peerless in their ability to give one the feeling that nothing remains to be said.

Never feel remorse for what you have thought about your wife; she has thought much worse things about you.

I should have no use for a paradise in which I should be deprived of the right to prefer hell.

It is not easy to imagine how little interested a scientist usually is in the work of any other, with the possible exception of the teacher who backs him or the student who honors him.