“he confessed that he could not understand how he had learned to ride a bicycle—a veritable feat of balance, equilibrium, and coordinated motor function—without once having had to use his reason. How could his body think by itself? How could it figure out the complicated motions that it had to execute so as not to fall flat on his face? These simple activities, in which you actually had to stop thinking to fully accomplish them, would fascinate him for his entire life, and even though he loved sports when he was a boy, he avoided all forms of physical exertion when he became a man.”