The first step in wisdom, as well as in morality, is to open the windows of the ego as wide as possible.

I consider the official Catholic attitude on divorce, birth control, and censorship exceedingly dangerous to mankind.

Few people can be happy unless they hate some other person, nation, or creed.

Morally, a philosopher who uses his professional competence for anything except a disinterested search for truth is guilty of a kind of treachery.

The essence of education is that it is a change effected in the organism to satisfy the operator.

Conventional people are roused to fury by departure from convention, largely because they regard such departure as a criticism of themselves.

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.