Ceng Zi is a student of Confucius. Once, Ceng Zi's wife was going to the market. Because the child was crying, Ceng Zi's wife promised to help him kill the pig when he came back. After Ceng Zi's wife came back from the market, Ceng Zi caught a pig and killed it. His wife stopped him and said, "I'm just joking with the children." Ceng Zi said, "The children are not joking. Children are not sensible. They listen to their parents and their teachings in everything. Now you cajole. Is to teach children to lie. " So Ceng Zi killed the pig. Ceng Zi knew that honesty and trustworthiness were the basic principles of life. If you don't kill the pig, the pig at home will be saved, but it will leave an indelible shadow on the mind of a pure child.

Li Yu Ian recorded a story about losing his life because he broke his promise.

A businessman in Jiyang sank while crossing the river. He grabbed a hemp pole and shouted for help. A fisherman heard the news. The businessman quickly shouted: "I am the richest man in Jiyang. If you can save me, I will give you 100 two gold. " After being rescued ashore, the businessman abandoned his account. He only gave the fisherman 10 two gold. The fisherman accused him of breaking his promise and leaving his post without leave. My husband had to leave disgruntled. Unexpectedly, the rich man capsized in the same place again. Someone tried to save him. The husband he cheated said, "He is the one who broke his word!" " "So the merchant drowned. The businessman capsized twice by accident and met the same husband, but it is expected that the businessman will not be rewarded. Because if a person breaks his word, he will lose the trust of others. So, once he is in trouble, no one wants to save him. Once he breaks his word, he doesn't have to do anything.