When the supermarket clerk tallied up my groceries, it was $12 over what I had on me. I began to remove items from the bags when another shopper handed me a $20 bill. “Please don’t put yourself out,” I told him. “Let me tell you a story,” he said. “My mother is in the hospital with cancer. I visit her every day and bring her flowers. I went this morning, and she got mad at me for spending my money on more flowers. She demanded that I do something else with that money. So, here, please accept this. It is my mother’s flowers.” —Leslie Wagner, Peel, Arkansas