Those who have had anything useful to say have said it far too often, and those who have had nothing to say have been no more reticent.

Science is a willingness to accept facts even when they are opposed to wishes.

The simulated approval and affection with which parents and teachers are often urged to solve behavior problems are counterfeit. So are flattery, backslap-ping, and many other ways of "winning friends.

I don't believe in God, so I'm not afraid of dying.

A person who has been punished is not thereby simply less inclined to behave in a given way; at best, he learns how to avoid punishment.

In the traditional view, a person is free. He is autonomous in the sense that his behavior is uncaused. He can therefore be held responsible for what he does and justly punished if he offends. That view, together with its associated practices, must be re-examined when a scientific analysis reveals unsuspected controlling relations between behavior and environment.

A self is a repertoire of behavior appropriate to a given set of contingencies.