It was the increasingly familiar mix of despair and exultation that had him in its grip. For one so long used to unfeeling, mastering it had come slowly, learning to hold and focus the energies so that they poured into his mind and brain. He had two, three days of sleeplessness coming, a brilliant flash of utter self-absorption, when he released that energy. Luther also knew he had to hold it for longer than usual, and that irked him.