Ancient scholars must have teachers. Teacher, so preach and teach to solve doubts. People are not born knowing, who can have no doubt? If you are confused and don't learn from me, you will be confused and you will never understand. When you are born before me, you will learn from me. After I was born, I studied Taoism first, so I studied Taoism. I am a teacher, and I don't know that years were born in me. Therefore, there is no nobility, no inferiority, no length, no shortage, and the existence of Tao and the existence of teachers.