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

"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."

"The human organism is not a mere puppet, but a complex system that interacts with its environment."

"The only way to do great work is to love what you do."

"Human behavior is determined by its consequences."