There was an American professor who had made a lifetime’s study of the Japanese tea ceremony. He was the western expert. He heard there was an old man living in Japan who was a master of the tea ceremony. So he made a special trip to Japan to see him. He found the master living in a small house on the outskirts of Tokyo and they sat down to have tea together. The professor immediately started talking about the tea ceremony, his study, all he knew about it and how he was looking forward to sharing his learning with the old man. The old man said nothing, but started to pour tea into the professor’s cup. While the professor talked, the old man continued to pour the tea, the cup filled and the old man kept pouring. The tea split down the sides of the cup in a stream onto the floor, yet the old man did not stop. “Stop!” said the professor. “You are crazy. You can’t fit any more tea in that cup. It’s full.” “I was just practising,” replied the old man, “for the task of attempting to pass learning to a mind that is already full.”