What are the idioms and ancient sayings used to describe people who do not know the truth and gossip?

Self-righteousness

Having a tendency to be a teacher - "Mencius Li Lou Xia" "The trouble with people is that they are a teacher to others."

Pretentiousness

Yelang is arrogant

Superficial and ignorant

"Six Quatrains of Play·One" by Du Fu

Wang Yang and Lu Luo were in the style of the time, and their frivolous writing continued

Er Cao's body and name will be destroyed, but the eternal flow of the Yangtze River will not be destroyed

"Xunzi Honor and Disgrace"

Those who fight forget their own bodies and their relatives. He who forgets his king. Acting on his anger for a short moment will cost him his life, but if he does it, he will forget his own body; if his family is ruined, relatives will inevitably be punished and killed, but if he does it, he will forget his relatives; the king's evil Yes, the criminal law prohibits it, but if you do it, you forget your king. Worrying about one's own body, forgetting one's relatives within oneself, and forgetting one's king above oneself are the things that the criminal law does not want to leave behind, and that the sage king does not want to forget. A suckling pig touches a tiger, and a suckling dog does not travel far and does not forget its close relatives. A human being is worried about himself, forgets his relatives at home, and forgets his king above him. This is a human being who is not as good as a dog.

Anyone who fights will always think that he is right and think others are wrong. It is true to be sincere to oneself, but not to be honest to others. This means that one is a gentleman and others are villains. A gentleman and a villain are at odds with each other. Isn't it just too much to forget one's own body due to worries, forget one's relatives internally, and forget one's king above? This is a human being, as the saying goes, "using the fox's father's attack as an ox's arrow". Will you think that wisdom is evil? This is so stupid. Will it be considered beneficial or evil? It will do great harm. Will you think you are honored? It would be a great disgrace. Will you think you are safe? There is no greater danger. Why do people fight? If I want the wild, deluded, sick, and evil beasts that belong to me, I can’t do that. The Holy King will punish them. I want the birds, rats, and beasts that belong to me, but I can’t do that. Their bodies are human, and their likes and dislikes are many. Why do people fight? I'm very ugly.

Lick one's skin and criticize one's bones

It is a metaphor for making rash comments after only seeing a little superficial phenomenon.

As for "Wild Grass", it's hard to say whether it will be done in the future. I probably won't do it again, so as to save people from mistrusting their confidants. (Lu Xun's "Sequel to the Sequel to the Collection of Huagai · Maritime Correspondence")

The crane is short and the duck is long

Zhuangzi · parallel thumb: "Although the shank is short, if it continues, it will cause worry; crane Although the shank is long, it will be sad if it is broken." Later, he used the metaphor of "a crane is short and a duck is long" to confuse right and wrong and make unreasonable comments.