A blind man took out a small blackboard and put it near him. It said, "I'm blind. Please help me. Some people walked by and gave him some coins (硬币). When the coin touched the ground, it made a little noise. And the blind nodded his head (点头) and said "Thank you".
Then a young woman came up to him. She cleaned the words on the man's blackboard and wrote a new sentence. Guess what? Many people gave the blind more coins. And the coins made much more noise. He had no time to nod his head and say thank you.
At last, the woman came back. She stood in front of him without a word. The blind knew it was her. He asked, "What did you write on my board?" The woman smiled and said, I did nothing, but just made your words beautiful. " It said, "It's a beautiful world. But I can't see it!"