ㄍㄨㄛˋguòㄧㄡˊyóuㄅㄨˋㄐㄧˊ

  1. 做事過分好比做得不夠一樣不妥指事其中論語·先進》:子貢?』不及。』然則?』過猶不及。』」·韓愈改葬〉:雖然未若過猶不及。」矯枉過正恰如其分

too far is as bad as not enough (idiom, from the Analects)​