"The way to build a car is not to put a man in it and tell him to push."

"We are controlled by the world in which we live."

"The only way to tell whether a given event is reinforcing to a given organism under given conditions is to make a direct test."

"Man is a machine in the sense that he is a complex system behaving in lawful ways."

"The environment determines the behavior of the individual, not some inner 'will.'"