On the issue of making friends, The Analects of Confucius records a passage that Confucius said, "Three friends are good, but three friends are bad. Friends are frank, friends forgive and friends listen more, which is beneficial. Friends will be open, friendly, soft, friends will be destroyed and damaged. " This is considered from the object of making friends, while Ceng Zi considers it from his own point of view. "Making friends without trust" is a kind of self-reflection.