A Chinese boy who wanted to learn about jade went to study with a talented old teacher. This gentle man put a piece of the precious stone into his hand and told him to hold it tight. Then he began to talk of philosophy, men, women, the sun and almost everything under it. After an hour he took back the stone and sent the boy home. The procedure was repeated for several weeks. The boy became frustrated. When would he be told about the jade? He was too polite, however, to question the wisdom of his venerable teacher. Then one day, when the old man put a stone into his hands, the boy cried out instinctively, 'That's not jade!'"