“安不忘危，治不忘乱”语出《周易·戏辞下》，平安时不忘记危险，治理的时候不忘记动乱。

In times of security, one should not forget about danger; when everything goes well, one should not forget about the fatal threats to the nation; when peace tules, one should not forget about potential chaos. (the Book of Change)