Anyone wants to become intelligent person. But human have more knowledges, human have more pain of his heart. For example, the person who have stupid heart is insensible to enter into a person feeling. He has no stress. But the person who have delicate heart give response to enter into a person feeling excessively. He has much tired. In the same, foolish person don’t think deeply. He don’t notice various problem about real life. He is very happy. But clever person always think deeply. He discovers various problem about real life. He has many pain of his heart. And we can’t judge that foolish is worse than wiser. We can’t judge that wiser is better than foolish.