The secret to happiness is to face the fact that the world is horrible.

The fundamental concept in social science is Power, in the same sense in which Energy is the fundamental concept in physics.

Escape from boredom is one of the really powerful desires of almost all human beings.

The wise man thinks about his troubles only when there is some purpose in doing so; at other times he thinks about other things, or, if it is night, about nothing at all.

Throughout the long period of religious doubt, I had been rendered very unhappy by the gradual loss of belief, but when the process was completed, I found to my surprise that I was quite glad to be done with the whole subject.

The most essential characteristic of scientific technique is that it proceeds from experiment, not from tradition. The experimental habit of mind is a difficult one for most people to maintain; indeed, the science of one generation has already become the tradition of the next

The whiter my hair becomes, the more ready people are to believe what I say.