So Silenus concentrates. He screams and rails and writhes, but he concentrates. Since there is nothing else to concentrate on, he concentrates on the pain. Pain, he discovers, has a structure. It has a floor plan. It has designs more intricate than a chambered nautilus, features more baroque than the most buttressed Gothic cathedral. Even as he screams, Martin Silenus studies the structure of this pain. He realizes that it is a poem.