Judge a book by its cover.

"Judge a person by his appearance" refers to judging a person's quality and ability according to his appearance; It can act as predicate, attribute and object in a sentence; With a derogatory connotation.

Origin of idioms

I took people by words, but I lost my life. I judge a book by its cover and lost my feather. (Biography of Zhong Ni Disciples in Historical Records by Sima Qian in the Western Han Dynasty)?

Later generations summed up the idiom "judge a person by his appearance".

Expand knowledge:

During the Spring and Autumn Period, Confucius, a great educator, had many students, one of whom was Yu Zi and the other was Zaiyu. Yuzi is ugly and handsome. Confucius' attitude towards them was quite different.

Yu Zi was ugly, so Confucius had a bad impression of him when he first met him. Confucius thought, "This man looks like an ugly man, and he must have no talent."

Therefore, his attitude towards Yu Zi is very cold. Later, Yu Zi had to drop out of school and return to his study.

Yu Zi's ugly appearance doesn't mean that she has no talent. After dropping out of school, self-disciplined Yuzi became a famous scholar.

For a handsome and beautiful person, it's easy to be mistaken for other things. For a person who looks sloppy and ugly, people often think that he is inferior to others in all aspects.

Once the impression is based on emotion, it often deviates from the fact. If you can't see the back of Excellence, you can't interpret it well. It is incorrect to judge people by their appearance, talent, virtue, words and deeds, or strength in isolation. As the old saying goes, "You can't judge a person by his appearance, let alone judge a large number of people." When you know people, you should look inside, and don't be blinded by appearances. Judging people by their appearances has no scientific basis and is not desirable. Compared with physical beauty, spiritual beauty is actually more important. After all, it is better to be honest with others than to judge people by their appearances.