Our character is compared to a stone of quadrilateral. The stone of top of the mountain is edgy. This is a quadrilateral. The stone go down slowly to the lower of a river. When the stone arrived at a flat area, the stone has been becoming round. Our character is same. When we are young, our character is edgy. We have been a temper, sensitivity, and rebellious. We are becoming an adult, we suffer pressure of various social problem. It is problem of human relations. We are crying, be troubled, and be tormented. When we are old, our character has been becoming round. We are mildly, modesty, and quietly. In our life, all human kinds must be passed choppy waves of human life necessarily.