“Lions, wolves, and vultures don't live together in herds, droves or flocks. Of all animals of prey, man is the only sociable one. Every one of us preys upon his neighbor, and yet we herd together.”
“Even such an obvious idea as to observe an animal with vertigo or to rotate an animal did not occur to him, in spite of the fact that he conducted numerous vertigo experiments with human subjects and made frequent use of animal experiments.”