1、 About self-cultivationThe appearance can be changed only by changing the inner part. A dark heart cannot hold a bright face. There must be kindness when there is love; If there is harmony, there must be happiness; There must be a pleasant face.The mouth is the door of the heart. What you say represents what you think. Heart and mouth are the same.A person with a low level cannot speak high words; A person without a sense of mission cannot speak words with a sense of responsibility; A perso...