" Something else," he told Atkins. He stood with his nose an inch away from the sergeant's, hands stuffed deep in the pockets of his coat. "What does Lucifer mean?"
"Light Bearer."
"And what is the stuff of the universe?"
"Energy."
"What is energy's commonest form?"
"Light."
"I know." And with that, the detective walked away, listing slowly through the squad room and down the stairs. He didn't come back. "

― William Peter Blatty , Legion