I headed into the post office in a big hurry. I had a number of things on my to-do list, but as I entered I was frustrated to find a long line backing up all the way to the door. “Hurry up and wait,” I muttered, glancing at my watch. My hand was still on the door when an elderly stranger approached me. “I can’t get this copier to work,” he said, pointing to the machine behind us. “It took my money and I don’t know what to do...”