人不可貌相,海水不可斗量 [ㄖㄣˊ ㄅㄨˋ ㄎㄜˇ ㄇㄠˋ ㄒㄧㄤˋ , ㄏㄞˇ ㄕㄨㄟˇ ㄅㄨˋ ㄎㄜˇ ㄉㄡˇ ㄌㄧㄤˋ; ren2 bu4 ke3 mao4 xiang4 , hai3 shui3 bu4 ke3 dou3 liang4] You can't judge a person by appearance, just as you can't measure the sea with a pint pot. (idiom) ◄ ►