But in fact, the swearing we often hear now is handed down by Confucius, and it is also included in the Analects of Confucius.
Confucius had a disciple named Zai Yu, who was flexible in mind, eloquent and suspicious of many things. In modern times, this person should be regarded as a very smart person by many people, but in ancient times, people would think that this person was a bit rebellious and cunning. Confucius liked Zai Yu very much at the beginning, because he was very clever, could draw inferences from one instance, and also had the spirit of seeking knowledge about many things.
But later Confucius gradually did not like him, because Zai Yu often asked many words that made Confucius feel shocking. It is said that once Confucius found that Zaiyu was sleeping in broad daylight. He was so angry that he scolded Zaiyu and said, "you can't carve rotten wood, you can't build walls of dung!"
As a result, these two sentences have been handed down and gradually broken down. The first sentence remains intact. We can often hear some teachers scold some students who are incompetent, saying that they are rotten and can't be carved. But the latter sentence gradually evolved into mud can not support the wall, in the mouth of teachers and parents can often hear, and even become a mantra when many people educate their children.
