Liu Bei's last words passed down through the ages are: "Don't act on the small evil, and don't act on the small good."

This sentence is familiar, not only from other people's mouths, but also from textbooks. This sentence is from the reflection of the three kingdoms, and it is Liu Bei's last words to his son Liu Chan.

At the time of Liu Bei's death, in order to make his son become a wise monarch, he wrote a testament to Liu Chan, and this sentence is a part of the testament. In the testament, Liu Bei said that he died in his sixties, and there was nothing to be sad about. I hope you can always do good deeds, don't do evil deeds, and study in Germany, which is convincing. In fact, this sentence of Liu Bei has an earlier source, which originated from Huai Nan Zi.

Liu Bei should have generalized and simplified the relevant words in Huai Nan Zi, which led to this famous saying. Today, the meaning of this sentence has not changed, and it is still to persuade people to do more good things and not to do bad things. However, in today's declining world, this sentence is particularly valuable and extremely alarming, which may be the reason why it was written into textbooks.