You can't go through life with a catcher's mitt on both hands. You need to be able to throw something back.
你不能双手都戴着接球手套度过一生。你需要能够回馈些什么。
【译文】你若忍住不说一句，就能平息别人的一次愤怒；你饶人一着，别人也会退让一步。
In mathematics, the art of proposing a question must be held of higher value than solving it.