What men really want is not knowledge but certainty.

I do not myself feel that any person who is really profoundly humane can believe in everlasting punishment.

No Carthaginian denied Moloch, because to do so would have required more courage that was required to face death in battle.

I believe that when I die I shall rot, and nothing of my ego will survive.

One of the most painful circumstances of recent advances in science is that each one makes us know less than we thought we did

Against my will, in the course of my travels, the belief that everything worth knowing was known at Cambridge gradually wore off. In this respect my travels were very useful to me.

In a democracy it is necessary that people should learn to endure having their sentiments outraged.