Into every tidy scheme for arranging the pattern of human life, it is necessary to inject a certain dose of anarchism.

When there are rational grounds for an opinion, people are content to set them forth and wait for them to operate. In such cases, people do not hold their opinions with passion; they hold them calmly, and set forth their reasons quietly. The opinions that are held with passion are always those for which no good ground exists; indeed the passion is the measure of the holder's lack of rational conviction.

The man who is unhappy will, as a rule, adopt an unhappy creed, while the man who is happy will adopt a happy creed; each may attribute his happiness or unhappiness to his beliefs, while the real causation is the other way round.

This idea of weapons of mass extermination is utterly horrible and is something which no one with one spark of humanity can tolerate.

...the nonexistence of God makes more difference to some of us than to others. To me, it means that there is no absolute morality, that moralities are sets of social conventions devised by humans to satisfy their needs.

Right conduct can never, except by some rare accident, be promoted by ignorance or hindered by knowledge.

Machines have altered our way of life, but not our instincts. Consequently, there is maladjustment.