强弩之极，矢不能穿鲁缟；冲风之末，力不能漂鸿毛。
释义Explanation
韩安国以强弩射至尽头、疾风吹至末梢为例，说明力量一旦衰竭，便连极薄丝绢和轻飘鸿毛也难以穿透或吹起。任何优势都有时效性，攻势、能力或影响力皆会随条件变化而衰减，不可仅凭初始强盛便盲目出击。它启示人们做事须审时度势，把握最佳时机，避免在势头已尽时仍勉强硬拼，否则往往事倍功半，甚至由主动转为被动。
In this line from Sima Qian's Records of the Grand Historian, Han Anguo argues against military aggression by noting that even the strongest force loses effectiveness when spent. A powerful crossbow at the limit of its range cannot pierce thin Lu silk; a gale in its final breath cannot lift a feather. The metaphor teaches that timing and momentum are crucial: once peak strength fades, action yields little result. It cautions against pressing forward when conditions have turned unfavorable, urging strategic patience and careful assessment of shifting dynamics.
使用场景Usage
在现代商业竞争中，企业若曾凭借先发优势迅速扩张，但当市场饱和、技术迭代放缓后，其原有优势会逐渐衰减。若仍固守旧赛道、强行加大投入，往往收效甚微。此时应像识得“强弩之末”的智者，及时评估自身势能与环境变化，将资源转向新的增长点，避免在力量衰竭阶段做无谓消耗。
This wisdom applies to modern business and personal projects. A startup may ride an early wave of rapid growth, but as market conditions shift and innovation stalls, its momentum fades. Pressing forward with outdated strategies often yields diminishing returns. Leaders should recognize when the 'crossbow is spent' and pivot to new opportunities, rather than wasting resources on fading momentum. Success favors those who act while strength is at its peak.