He wheeled a corpse into the narrow furnace, and said, there's something I want to show you. He lit the gas, and the head rose from the table, the arms flew open and the body sat there for a moment in the fire. The flesh peeled away from the bones, and the bones snapped and burned with a fierce blue flame. When the oven had cooled and the door was opened, the ashes and bits of bone threw off a pale, opalescent light. That light, he said, is what I wanted you to see.