The reality is: sometimes you lose. And you’re never too good to lose. You’re never too big to lose. You’re never too smart to lose. It happens.

出自先秦《荀子·哀公》。鸟被逼得走投无路之时就会用嘴啄人，兽到困窘之时就会用爪抓人，人到穷困潦倒之时就会设计骗人。以鸟兽困窘之时的行为为喻，说明人到穷困潦倒之时便会放弃道德操守的原因。

The only wisdom we can hope to acquire is the wisdom of humility: humility is endless.

数学的美只对那些更有耐心的追随者展示。

You can’t go back and change the beginning, but you can start where you are and change the ending.