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.

我不怕未来，我怕过去。

It always seems impossible until it's done.

The P versus NP problem is one of the most important unsolved problems in computer science.

文字的力量是巨大的；它们可以治愈，可以毁灭，可以创造世界。