According to the query of Baidu Chinese, we know that a gentleman is safe without forgetting danger, keeps without forgetting death, and manages without forgetting chaos. This is taken from the fifth chapter of Yi Zhuan, which explains that the Scholar's country is stable without forgetting danger, the country does not forget destruction, and the country does not forget chaos.

This chapter mainly talks about nine virtues. Because Confucius said it three times in total, later generations called it "three Chen Jiu De". Confucius' three virtues can be divided into three levels: one is about the essence of nine virtues, the other is about the application of nine virtues, and the third is about the role of nine virtues.