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

We shouldn't teach great books; we should teach a love of reading.

To say that... behaviors have different 'meanings' is only another way of saying that they are controlled by different variables.

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

Twenty-five hundred years ago it might have been said that man understood himself as well as any other part of the world. Today he is the thing he understands least.

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.

The major difference between rats and people is that rats learn from experience.