The world is what it is; men who are nothing, who allow themselves to become nothing, have no place in it.

解释：不可以不知道活着的乐趣，也不可以不知道虚度光阴的担忧。

"It's funny how you can forget everything except people loving you."

Life is too short to be living somebody else's dream.

研究不仅仅是回答问题，还要提出正确的问题。