As the saying goes: A kind word warms you for three winters, but a bad word hurts you for six months. This tells us how much influence and destructive power words have on people. Celebrities in history have left many words, some of which are famous aphorisms to warn the world. Some are just casual "dirty words", but they have been passed down to later generations, and have even become teachers' mantras now.

The ancient sage Confucius had 3,000 disciples in his life. It can be said that Confucius was the most famous person in the world at that time. Confucius also said many famous aphorisms in his life, which were collected by his disciples in the book "The Analects of Confucius". Now we are all still studying "The Analects" and learning the principles of life and doing things in it.

What Confucius said was not only good advice, but also a casual "dirty word", which had a great impact. What did Confucius say? To whom was it said? This has to mention his student Jaeyu. Compared with other Confucius students who were down-to-earth and studied hard, Jaeyu was an anomaly.

Every time Confucius was giving a lecture, you could often see Jaeyu sleeping. At first, Confucius would remind him privately to listen carefully to the lecture. But later, after Jaeyu repeatedly promised to never do it again, he still made the same mistake again and remained the same. Confucius was very angry when he saw that Zaiyu refused to change despite repeated teachings, so he said: Rotten wood cannot be carved, and a wall of dung cannot be stained.

This means: rotten wood can no longer be used for carving, and dirt on the wall cannot be smeared without a trace. In fact, Confucius said that Jaeyu is like mud that cannot be used to hold up a wall, and a rotten tree that cannot be taught. In fact, Confucius's evaluation of Jaeyu was not just because of Jaeyu sleeping during the day. At the beginning, Jaeyu put forward different arguments about the three-year filial piety etiquette that everyone abides by.

Jaiyu said to his teacher Confucius: Instead of observing filial piety for three years in a casual way like other people do, it is better to observe the last year seriously. After listening to what Yu said, Confucius didn't say anything. He just said to do as you said. But after Zaiyu left, Confucius said to other students: "Jaiyu is unkind." From then on, Confucius already had an opinion about Zaiyu's heart. Later, he also found that when Zaiyu was sleeping in class, he was He was even more disappointed, so he said this "dirty word".

But what is unexpected is that this sentence casually said by Confucius is still very popular today, and has even become a mantra for many teachers to educate those disobedient and poor students. In fact, from what Confucius said, we can see that Confucius was not a tolerant and generous sage as history said. On the contrary, he sometimes had a one-sided understanding.

He thought that Jaeyu was useless, but in the end, Jaeyu achieved high achievements and became famous all over the world. It seems that Confucius made a mistake. So this is also a wake-up call for current teachers. For children, we should focus on encouraging and educating children, rather than criticizing and scolding, because bad words hurt people, and a teacher's casual words may have a lifelong impact on students.