Sometimes Mr. Cogito recalls, not without emotion, his youthful attempts at perfection, those juvenile per aspera ad antra. One day a small pebble happened to fall inside his shoe as he was hurrying to classes. It maliciously worked its way between raw flesh and his sock. Common sense suggested that he get rid of the intruder, but the principle of amor fati demanded on the contrary that he endure it. He chose the second, heroic solution.