If the inner psychic ground of our individual appearance were not always the same, there could be no science of psychology, which qua science relies on a psychic inside we are all alike, just as the science of physiology and medicine relies on the sameness of our inner organs. … The monstrous sameness and pervasive ugliness so highly characteristic of the findings of modern psychology, and contrasting so obviously with the enormous variety and richness of overt human conduct, witness to the radical difference between the inside and the outside of the human body.

pp. 34-35. - The Life of the Mind (1971/1978)