We admire people to the extent that we cannot explain what they do, and the word 'admire' then means 'marvel at.'
B. F. SkinnerWe have seen that in certain respects operant reinforcement resembles the natural selection of evolutionary theory. Just as genetic characteristics which arise as mutations are selected or discarded by their consequences, so novel forms of behavior are selected or discarded through reinforcement.
B. F. Skinner