"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.'"

"The highest possible achievement is to be able to live for the present moment, fully and completely."

"Behavior is shaped and maintained by its consequences."

"The way to get things done is not to mind who gets the credit for doing them."

"The world would be a better place if we gave up the notion of individual responsibility."