吃一堑，长一智 (吃一塹，長一智) chī yī qiàn, zhǎng yī zhì

chī yī qiàn, zhǎng yī zhì phrase Fall into the moat and you'll be wiser next time; One only learns from one's mistakes.
Domain: Proverb 谚语
Notes: (CC-CEDICT '吃一塹，長一智')