智者千虑，必有一失

Explanation: No matter how smart people, in many secondary considerations, also will appear to individual error. 　　Usage: Complex sentence; for clause; that do not over-confident 　　Source: "Records of the Historian Huaiyin Marquis Biography" Chen Wen wise man is yet to be a loss; fool nods Gains. " 　　Examples: Another wise man should not be proud, because ~. Thesaurus:  A fool's bolt may sometimes hit the mark., A fool's bolt may sometimes hit the mark.