One day, in a heavily crowded place, a young man began shouting.

"People, look at me. I have the most beautiful heart in the world."

Many people looked at him and were stunned to see his beautiful heart in a perfect shape, without any flaw. It looked quite amazing. Most of the people who saw his heart were mesmerized by the beauty of his heart, and praised him.

However, there came an old man who challenged the young man, "No my son, I have got the most beautiful heart in the world!"

The young man asked him, "Show me...