世界上有很多好人。如果你找不到一个，那就成为一个。

I think the best moments in my career are the ones where I'm just completely surprised by something.

So given a Time Turner, I would tell my 21-year-old self that personal happiness lies in knowing that life is not a check-list of acquisition or achievement. Your qualifications, your CV, are not your life, though you will meet many people of my age and older who confuse the two. Life is difficult, and complicated, and beyond anyone’s total control, and the humility to know that will enable you to survive its vicissitudes.

Don’t you wonder sometimes， what might have happened if you tried？

科学是一个永无止境的旅程，总有更多的东西需要学习和发现。