Han, Dong Yuchuan. Suffering from resentment (salvation): disaster danger. There is no better way to get happiness and goodwill than harmony, and the biggest disaster and danger is no worse than internal division. Internal harmony and unity, intimacy, Qi Xin work together, it is easy to succeed, and external enemies dare not act rashly, and life is naturally happy and beautiful. Seeking happiness and beauty through harmony is indeed the best way. Internal disintegration, contradictions, fierce struggle, it is difficult to succeed in doing things, and external enemies also believe that when there is an opportunity, disaster will come. These two sentences can be used to explain that harmony brings good luck and internal division brings disaster, warning people to pay attention to unity.
Historians of the Eastern Han Dynasty Ban Gu, Dong and Yu Chuan