Mencius' "Born in sorrow and died in happiness" has a great sense of sorrow. Expressing sadness and difficulties can make people strive to survive, and a comfortable and happy life can make people slack off and lead to extinction. Only with a certain sense of crisis and anxiety can we survive in the fierce competition.

2.fan Zhongyan

Fan Zhongyan's "worry about the world first, and enjoy the world later" means that officials should put the interests of the country and the nation first, be prepared for danger in times of peace, share their worries for the future and destiny of the motherland, and contribute to the happiness of the people under the sun, which shows the author's great political ambition and great courage.

3. Qu Yuan

Qu Yuan was ostracized and slandered by the nobles and exiled to the Northern Han Dynasty and Yuanxiang Valley by the new monarch. However, he was still absorbed in political affairs and worried about the safety of Chu. Considering that Chu was powerless to return to heaven and unwilling to be the king of national subjugation, he chose to throw himself into the river.

4. Li Shimin

Emperor Taizong once said to his trusted ministers: Now the country is fortunate to have peace and tranquility, and ethnic minorities in all directions obey it. This is really rare since ancient times, but I am getting more and more careful every day. I am afraid this situation will not last long, so I hope to hear your suggestions and arguments many times. Although the country is rich and powerful, it still has a sense of urgency.

5. Jiang Wei

During the Spring and Autumn Period, the twelve countries jointly attacked Zheng, Zheng made peace with the State of Jin, and gave a lot of gifts to the State of Jin. Duke Jin sent many gifts to minister Jiang Wei, who wanted to share them, but he refused.

Jiang Wei advised Jin Wengong: "I hope that while you are enjoying happiness, you can think that the country still has many things to do. There is a saying in the book:' Be prepared for danger in times of peace, be prepared for danger in times of peace.' Now I want to convince my master with this! "So the duke of mourning accepted Jiang Wei's opinion.