stupid is as stupid does

Proverb

One's lack of intelligence may be judged by one's actions.

Japanese Meaning

人の知性のなさは、その行動によって測られる。 / 行動により愚かさが露呈するという教訓

彼が過ちを隠すために嘘をつき、プロジェクトを台無しにした後、皆はため息をつき、上司はささやいた。「人の愚かさは行動で分かる。」

Sense（1）

One's lack of intelligence may be judged by one's actions.

As long as a man can pay twenty shillings in the pound and a trifle over, what does it matter

if all the judges in the land was to call him stupid?' said Snengkeld.

"Stupid is as stupid does." said Kantwise.

"Stupid be d--." said Moulder.

"Mr. Moulder, there's ladies present." said Mrs. Smiley,