Thousands of years ago, in ancient China, medicine was practiced quite opposite to the way it is practiced today. In those days, every household put a vase outside its door. As the healer made his daily rounds through the houses of the village, he would look into each vase. If there was a coin inside it, he took the coin and went on his way, knowing that everyone in the house was healthy. If the vase was empty, the healer knew that someone inside was ill. He would enter and treat the patient to the best of his ability. When the sick person was well again, the daily payment of a coin resumed...