事实胜于雄辩 Facts speak louder than words
Explanation
指事实比任何华丽的辩解都更有说服力。
means that facts are more persuasive than any eloquent argument.
Origin Story
唐代诗人李白，才华横溢，诗句豪迈，但他为人洒脱不羁，常因酒后与人争辩，不免理亏。有一次，他与一位名士在酒席上发生争执，李白信誓旦旦，引经据典，滔滔不绝地论证自己的观点。对方却只是静静地听着，并不反驳。最后，对方从容不迫地拿出几份书信，信中记载了李白先前说过的话，与他此刻的言论大相径庭。事实胜于雄辩，李白无话可说，只好自嘲一笑。从此之后，李白也变得更加谨慎，不再轻易信口开河。
The Tang Dynasty poet Li Bai, was immensely talented, his poems majestic, yet his nature was unrestrained and free-spirited. Often after drinking, he would get into arguments and be at fault. Once at a banquet, he argued with a celebrated scholar. Li Bai swore his point was right, quoting classics and arguing eloquently. The other man simply listened and did not counter. At last, the scholar calmly produced several letters, which recorded Li Bai's prior statements, differing radically from his current pronouncements. Facts are stronger than words, Li Bai had nothing to say, only a self-deprecating laugh. Afterward, Li Bai became more careful, no longer speaking rashly.
Usage
常用作宾语、分句；指用事实说话。
often used as object or clause; means to speak with facts.
Examples
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事实胜于雄辩，他最终承认了自己的错误。
shìshí shèngyú xióngbiàn, tā zuìzhōng chéngrèn le zìjǐ de cuòwù. zhèngjù quèzáoméi, shìshí shèngyú xióngbiàn！
Facts speak louder than words; he finally admitted his mistake.
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证据确凿，事实胜于雄辩！
The evidence is conclusive; facts speak louder than words!