In this chapter of scripture. Don't believe in making friends? Have you ever been sincere to your friends? This is Ceng Zi's introspection, but this sentence tells the truth that when friends meet, honesty is the foundation. In human society, communication between people seems to be a very common thing, but in communication, the premise of honesty does not exist, which is hard to imagine. People have no faith, society is chaotic, and the world is restless. This is a terrible thing. Therefore, Ceng Zi's words are not only words of introspection and self-encouragement, but also words that each of us should introspect and follow. Only when we are honest in communication can the society be stable and the world be harmonious.