事实胜于雄辩

事實勝於雄辯
shìshíshèngxióngbiàn
facts speak louder than words (idiom)

CEDICT

facts speak louder than words; facts are stronger than rhetoric; facts are more convincing than eloquent theories

Wiktionary

事实本身强辩具有说服力

重編國語辭典

事实本身强辩具有说服力

維基詞典

Entry Composition