After understanding the truth, honor and disgrace, a person should keep a low profile, restrain his words and deeds, and maintain a modest attitude. Reasoning: Understand the nature and laws of things and have a clear judgment on right and wrong. Know honor and disgrace: know what honor and disgrace are, and know how to respect yourself and others. Self-restraint, self-modesty: keep a low profile in words and deeds, keep a modest attitude towards your own advantages and achievements, tolerate others and be strict with yourself. This sentence emphasizes that after a person has certain knowledge and quality, he should keep modest and low-key quality and constantly improve himself in order to better integrate into society and deal with interpersonal relationships.