"We shouldn't think about what people feel, but about what they do."

"I deny that I have ever attacked anyone's dignity. I have attacked the concept of dignity as a causal agent."

"We are all controlled by the world, part of the time in rather crude ways, and part of the time very subtly."

"I am sometimes accused of having left something out of account in my analysis of human behavior, and I usually admit it. I have left out the mind."

"The consequences of behavior determine the probability of its recurrence."