Fifty-five years ago an eccentric and rather egocentric seminary professor called my roommate into his office and asked him to exchange eyeglasses. The professor was farsighted and wore pince-nez spectacles. My classmate was extremely nearsighted and wore the then newly fashionable horn-rimmed glasses. “How do I look?,” the professor asked. He could not see himself in the mirror through the student’s glasses, and the student could not even see where the professor was through the exchanged spectacles.