"Man is a machine, but a machine in the sense that a tree is a machine. What he does, he does because of his structure, not because of some indwelling agent called a 'will.'"

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

"The fact that people are happy, content, and well behaved, though controlled, is a terrifying indictment of the human condition."

"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."

"We are not responsible for our behavior, but we are responsible for the environment that controls it."