"The study of human behavior is not an attempt to explain away human dignity, but to clarify the conditions under which human beings can achieve their greatest potential."

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

"We are the product of our environment."

"When you have a choice to make, but you don't make it, then that is a choice in itself."

"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."