have sense enough to know others; know how to judge people ? 我們應該有“自知”之明，也該有～； ……(魯迅《且介亭雜文末編·“立此存照” （三）》135) We should have sense enough to “know ourselves，”and sense enough to know otherstoo.
知人之明zhī rén zhī mínɡ
指有識別人的才能、人品的眼力。a keen insight into a person’s character, ability to appreciate a person’s character and capability