"The most important thing is to stay optimistic."

I don't have to be perfect. I just have to try my best.

When you work on hard problems long enough, you start to see connections where others see only confusion.

生产力的提高是社会进步的动力。

The problem is, if you really believe in a society where those who merit to get to the top, get to the top, you'll also, by implication, and in a far more nasty way, believe in a society where those who deserve to get to the bottom also get to the bottom and stay there. I nother words, your position in life comes to seem not accidental, but merited and deserved. And that makes failure seem much more crushing.