Once, in a bustling village market, a young boy found a smooth, unremarkable gray stone near a riverbank. He brought it to his father and asked, "Papa, what is this stone worth?"

The boy went to the . An old woman saw the stone and said, "That would look lovely in my garden. How much?" The boy held up two fingers. "Two dollars?" she asked. "I’ll take it!" The boy shook his head and returned home, amazed that a common stone could be worth two dollars.

His father smiled and said, "Go to the market. If anyone asks the price, hold up two fingers and say nothing. But do not sell it."