Peace without forgetting danger, survival without forgetting death, and governance without forgetting chaos-the Book of Changes.

If a person doesn't think about distant things, he will find sadness close at hand. -The Analects of Confucius

Worry and fatigue can rejuvenate the country, leisure can die-Ouyang Xiu

Be prepared for danger in times of peace, abstain from extravagance and frugality —— Wei Zhi's Ten Thoughts on admonishing Taizong

Don't forget the danger, the prosperity will be worried about the decline. -(Hanshu)

Decadence has no beginning, but freshness has an end (The Book of Songs).

Difficulties and hardships make you successful-Zhang Zai, a writer in the Northern Song Dynasty