- in time of peace prepare for war
- 居: reside; dwell; live
- 安: peaceful; quiet; tranquil; c ...
- 当: proper; right
- 危: danger; peril
- 居安思危: be prepared for danger in times of peace; be vigilant in peace time; keep your powder dry!; mindful of possible danger in times of peace; provide against danger while living in peace; think of danger in time of peace; though enjoying security, one should ever be prepared for danger
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