The Pocket Watch

As he did every morning, the old watchmaker unlocked his shop and stood by the door, watching the quiet street wake up. A few moments later, a young boy walked in carrying an old pocket watch. Holding it out with both hands, he asked, "Excuse me, sir... could you repair this?" The watchmaker smiled and carefully took it from him. He turned it over a few times before opening the back cover. Inside, written in letters so tiny they were almost impossible to read, was a single sentence. Don't repair this.