I say luck is when an opportunity comes along and you're prepared for it.

不要担心你在数学上遇到的困难；我敢保证我遇到的困难比你还大得多。

故事是理解过去的方式。

"The best books are the ones that leave you a little different than when you started."

有时候生活会给你当头一棒，但不要失去信心。