From "The Analects of Confucius, Administration and Records of Zhang Xuegan".

Confucius said, "It is rare to listen to doubts more and be careful about the rest." If you see more dangers, if you are cautious about the rest, you will regret it. If you don't say anything, you will regret it, and Lu is one of them! "

Silence is golden, which means calm people think silently and succeed. This is a common idiom in daily life.