Once, someone told me about the time they forgot their wallet at a grocery store. They had already scanned their items and realized they couldn’t pay. Embarrassed, they began apologizing to the cashier, ready to put everything back. Out of nowhere, a kind stranger in line offered to cover the bill. At first, they declined, but the stranger insisted with a warm smile. Grateful and a bit flustered, they accepted. They promised to pay it forward someday. That small act of kindness stayed with them for years.