Mathematics is not a deductive science—that's a cliché. When you try to prove a theorem, you don't just list the hypotheses and then start to reason. What you do is trial and error, experimentation, guesswork.

You have to believe in yourself when no one else does.

The only thing you have to fear is fear itself.

美是一种终极价值——我们因其本身而追求它，无需进一步的理由。

译文：西风落日下野草斑驳，秋日天空云淡风轻，一只孤鸟飞过。我这个两鬓斑白的游子，又骑着马登上了太行山。