One day, a little girl came home from school. She looked sad. Her mother asked her what happened.  She answered, “On my way home, an old man asked me, ‘Where is a post office?’ I told him the way. For example, go straight, and turn left at the third corner, and turn right at the hamburger shop. But he couldn’t understand me. He said, ‘Can you take me to the post office?' Then, I remembered your words. Mom, you are always saying to me, "Don’t follow a stranger," so I refused his request. I wanted to be kind to him, but I couldn’t be kind to him. So I feel sad.”