Traced to Su Shi's 《上两制书》 (Song): 古之圣贤建功立业,兴利捍患 — ancient sages built merit, established deeds, brought benefit, and defended against harm. Casts the ideal public figure.
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Elevated, often patriotic or ambitious in tone. Fits speeches about youth aspiration, military service, pioneering careers. Less suited to small-scale personal goals.