One day a king went to a far away place in his country. When he came back, his feet hurt a lot. "There are too many small stones on the roads. They hurt my feet. You should cover (覆盖) every road with leather (皮革)," he told his men. Of course, it would cost a lot of money. One of his men was very smart. He told the king, "Why not cut a little piece of leather to cover your feet?" The king was surprised. He agreed to the man's idea. He asked his men to make a pair of leather shoes for him.

    Maybe this is not the beginning of leather shoes. But it teaches us a lesson of life: if you want to make this world a happy place to live in, the best way is to change yourself, not the world.