"I'll tell the Supreme Bishop you're leaving," said Boone and went past Mike into the smaller room.  He reappeared at once. "He's left," he announced. "There's a back way into his study." Boone smiled. "Like cats and cooks, the Supreme Bishop goes without saying.  That's a joke.  He says that 'good-by's' add nothing to happiness in this world, so he never says good-by.  Don't be offended."