the proof of the pudding is in the eating; evidence over debate
Proverb meaning that concrete evidence or results are more convincing than theoretical arguments.
口で説明するより、実際にやってみせたほうが早い。論より証拠だ。
It's quicker to actually show it than to explain it in words. The proof of the pudding is in the eating.
彼は自分の理論
He conducted an experiment to prove his theory. Evidence is better than debate, as they say.
A Japanese proverb composed of 論 (argument, theory), より (than), and 証拠 (evidence, proof). The exact origin is uncertain, but it reflects a common-sense preference for practical demonstration over mere words.