"The fact that people are happy, that they feel free, that they do what they want to do, is not a guarantee that they are behaving effectively or that they are doing what is best for them."

"The way in which we think about the causes of human behavior has changed in a way that suggests that we are at an early stage of a scientific revolution."

"The only way to tell whether a given event is reinforcing to a given organism under given conditions is to make a direct test."

"The majority of people don't want to plan. They want to be free from the responsibility of planning."

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