"There was a man who invented the art of making fire. He took his tools and went to a tribe in the north, where it was very cold, bitterly cold. He taught the people there to make fire. The people were very interested. He showed them the uses to which they could put fire - they could cook, could keep themselves warm, etc. They were so grateful that they had learned the art of making fire. But before they could express their gratitude to the man, he disappeared…”