We have seen that in certain respects operant reinforcement resembles the natural selection of evolutionary theory. Just as genetic characteristics which arise as mutations are selected or discarded by their consequences, so novel forms of behavior are selected or discarded through reinforcement.

A disappointment is not generally an oversight. It might just be the best one can do the situation being what it is. The genuine error is to quit attempting.

The world's a poor standard. any society which is free of hunger and violence looks bright against that background.

Behavior is determined by its consequences.

Do not intervene between a person and the consequences of their own behavior.

When we say that a man controls himself, we must specify who is controlling whom.

Give me a child and I'll shape him into anything.