Belief in a Divine mission is one of the many forms of certainty that have afflicted the human race.

How about Pithecanthropus Erectus? Was it really he who ate the apple? Or was it Homo Pekiniensis?

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.

Love is a little haven of refuge from the world.

A happy life must be to a great extent a quiet life, for it is only in an atmosphere of quiet that true joy dare live.

The desire for legitimate offspring is, in fact, according to the Catholic Church, the only motive which can justify sexual intercourse.

I never held Negroes to be inherently inferior. The statement in Marriage and Morals refers to environmental conditioning. I have had it withdrawn from subsequent editions because it is clearly ambiguous.