知人者智，自知者明 [－－－－－－－－－]

Jyutping zi1 jan4 ze2 zi3, zi6 zi1 ze2 ming4
Pinyin zhī rén zhě zhì , zì zhī zhě míng

Definitions (CC-CEDICT)
  1. those who understand others are clever, but those who know themselves are truly wise (idiom, from Laozi's 道德經|道德经[Dao4 de2 jing1]