The meaning of this sentence is: Don't ignore other people's big advantages because of small shortcomings, and don't forget the great kindness others have shown you because of small grievances with others.
Source:
(1) Qing Dynasty Shen Juyun's "Xiyan Tuyu"
(2) Qing Dynasty Zeng Guofan's "Zeng Guofan Family Instructions"
p>Interpretation of this sentence:
As long as people do things, they will make mistakes. These two sentences tell us not to blame others for their small faults or small moral flaws. If you have grudges, you will completely deny the goodness of others and forget the kindness of others.
The "Book of Rites" says, "Those who are good and know their evils, and who are evil and know their beauty are rare in the world." It means that if you like a person, you know his shortcomings, and if you hate him, you know his advantages. This is to warn us that when dealing with others, we must not be too emotional and must look at other people's shortcomings and deficiencies objectively and fairly.
Extended information:
"Zeng Guofan's Family Instructions" is a book published by Chongqing Publishing House in 2006, compiled by Cheng Xiaojun and Tang Zhaomei. This book mainly introduces Zeng's family mottos and family letters from several aspects such as life and life. It is a book of great historical value. This book is compiled and processed based on Zeng Guofan's family mottos, family letters and other historical materials. It is classified into several aspects: conducting oneself in society, being a political and military leader, adhering to family tradition, and caring for one's body and mind. It also provides detailed annotation, translation, and analysis.
While introducing the contents of Zeng’s family motto, we also focus on guiding today’s people to learn from and absorb the beneficial elements. This book is suitable for reference study by historical researchers.
Baidu Encyclopedia-Zeng Guofan’s family motto