Lǐngdǎozhě xūyào kào shílì jiànlì wēiwàng, ér búshì kào quánlì.
A leader must build prestige through ability, not through power.
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usage
威望 combines respect earned through 威 (authority, might) and 望 (reputation, public esteem). It implies prestige that comes from real accomplishment. Compare 声望 (renown), which is more about fame, and 权威 (authority), which implies institutional power.