Reflections on Behaviorism and Society. Chapter 6: The Steep and Thorny Way to a Science of Behavior. Quote 3

“We know something about the chemical and electrical effects of the nervous system and the location of many of its functions, but the events that actually underlie a single instance of behavior—as a pigeon picks up a stick to build a nest, or a child a block to complete a tower, or a scientist a pen to write a paper—are still far out of reach.” (p. 69)