The act of writing is an act of optimism. You would not take the trouble to do it if you felt it didn't matter.

I know how much work it takes to get to the top, but even more to stay there.

I don't believe in anything, and that's the only thing I believe in.

数学是一种思维方式，而不仅仅是一堆事实。

The deepest theorems in mathematics often have the simplest statements.

我感到很幸运能够做我喜欢的事情。