The name of Confucius’s least favorite student was Zaiwo. Because Zaiwo continued to sleep in instead of working in broad daylight, Confucius cursed him with the famous saying: Rotten wood cannot be carved, and a wall of dung cannot be stained? . Confucius was a great educator and thinker in our country. He had more than 3,000 disciples, including 72 sages.

Confucius knew how to teach students in accordance with their aptitude, but this does not mean that he liked every student under him. The student Confucius disliked the most was Zaiwo, not because Zaiwo's name was too arrogant, but because Zaiwo's character was too distinctive. His thoughts were completely different from those of Confucius, and the two had disagreements on many things.

As soon as Zaiwo came to Confucius’s disciples, he told Confucius that three years of filial piety is too long for children after their parents die, because three years will make a person unfamiliar with etiquette and music, so he thought that one Years are enough. Confucius did not agree with Zaiwo's point of view, thinking that Zaiwo was not a filial gentleman.

The thing that disappointed Confucius most about Zaiwo was the conversation between Zaiwo and Duke Ai of Lu. Duke Ai of Lu once asked Zaiwo what kind of wood should be used to make memorial tablets for sacrifices. Zaiwo replied that the wood used in the Xia Dynasty was pine, the wood used in the Shang Dynasty was cypress, and the wood used in the Zhou Dynasty was chestnut. Originally, the conversation could have ended here, but I would like to add another sentence, "The reason why the Zhou Dynasty used chestnut wood was to make the people tremble." Zaiwo's answer was seriously inconsistent with Confucius' thoughts, which made Confucius completely disappointed with him.

The accumulation of these large and small things made Confucius not like this disciple at all, and even felt disgusted. One day, Confucius saw Zaiwo sleeping in broad daylight, and he uttered an eternal saying: "Rotten wood cannot be carved, nor can a wall of dung be stained."

The ending of Zaiwo was also very tragic. He originally belonged to the country because he participated in the Tian Chang Rebellion. Later, he was executed by the country and was also punished by the Nine Tribes.