A child becomes an adult when he realizes that he has a right not only to be right but also to be wrong.

Knowledge is gained by learning; trust by doubt; skill by practice; and love by love.

Traditionally, sex has been a very private, secretive activity. Herein perhaps lies its powerful force for uniting people in a strong bond. As we make sex less secretive, we may rob it of its power to hold men and women together.

We often speak of love when we really should be speaking of the drive to dominate or to master, so as to confirm ourselves as active agents, in control of our own destinies and worthy of respect from others.

The language of science—and especially of a science of man—is, necessarily, anti-individualistic, and hence a threat to human freedom and dignity.

If the dead talk to you, you are a spiritualist; if God talks to you, you are a schizophrenic.

If someone does something we disapprove of, we regard him as bad if we believe we can deter him from persisting in his conduct, but we regard him as mad if we believe we cannot.