What is the historical story of idioms self-defeating Does this idiom mean anything to us?

We all know that the idiom self-defeating actually refers to him. He wanted to show off and make others think that he did better, but he did a stupid thing and made it worse.

So what kind of story does this idiom tell us? In fact, in the Northern Song Dynasty, there was a painter who was very good at drawing figures, and then he was once entrusted by others to draw a picture of the monarch of nine planets. He painted very well in the early stage, and all the characters he painted were lifelike, except for the last process. He was invited to drink at that time, and he had nothing to say. He told his disciples that he painted everything except colors. Don't draw the wrong color. I hope you can draw it when I come back. Then they left, and the disciples gathered around the painting, repeatedly watching the teacher's skills and communicating with each other.

Then one of the disciples, usually very clever, never spoke. Someone asked him why he didn't speak, because everyone else was talking about the painting. Then he said that everything was vivid, but there seemed to be something missing from the crystal bottle in his hand. Then the disciple said that the teacher would miss a flower every time he painted, but it was impossible to go out in a hurry this time. We still draw first and then draw, and then he draws on the bottle mouth. Because of this flower, this painting has become a very big joke. Then it's self-defeating. Although he paints very well, he just wants to make this painting too perfect. But just because he added this flower, he ruined the whole painting. This is the story of the idiom self-defeating He also told us that in our daily life, we should never do such self-defeating things.

Although you think you should be smart, we should never be smart when we do things, and don't think about showing off when our ideas are immature, because it will make us ignorant.