學然後知不足 [ㄒㄩㄝˊ ㄖㄢˊ ㄏㄡˋ ㄓ ㄅㄨˋ ㄗㄨˊ; xue2 ran2 hou4 zhi1 bu4 zu2] to learn is to know one's ignorance (the Book of Rites 禮記) ◄ ►