A certain day a man found himself on one of his trips, a very beautiful and expensive gem and put it in his pocket. After spending a few hours he met a traveler and when he opened his pocket to get money, the traveler saw the jewel and asked for it.
The man kindly gave it to him without further ado. The traveler thanked him and went full of joy with that unexpected and valuable gift that would be enough to give him wealth and security all the rest of his days. However, a few days later he returned in search of that kind man who gave it to him, found it, returned the jewel and begged him: "Now I beg you to give me something of much more value than this jewel. Give me, please, what allowed you to give it to me. "