You hit the nail on the head.

You hit the nail on the head.西遊記瘋美語 NO.18

取經路途遙遠，八戒耐不住性子開始抱怨。八戒問師父這麼千辛萬苦、流汗流血去西天取經，到底是為了什麼？師父回為了眾生，You hit the nail on the head.