吃一堑，长一智

Explanation: Cut: trench, metaphor difficulties or setbacks. By a setback, an increase of one point insight. 　　Usage: Complex sentence; for subject, predicate, clause; for lessons learned 　　Source: Ming Wang Shou-ren, "the book and Xueshang Qian WANG Wen public book": "The subordinate state were a lesson, today's loss, not after the date may not be." Thesaurus:  Breakdown be Triumph Mother, Deception Astray