事實勝於雄辯

事实胜于雄辩
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

事實本身強辯具有說服力

重編國語辭典

事實本身強辯具有說服力

維基詞典

Entry Composition