任何有机体最难做的事情就是观察自己。

即使是小小的技艺，也一定有值得一看的地方。但对于远大的事业恐怕有所阻碍，所以君子不去干这些。

For in the final analysis, our most basic common link is that we all inhabit this small planet. We all breathe the same air. We all cherish our children's futures. And we are all mortal.

The next generation won't ask what we said—they'll ask what we did.

科学的进步不仅通过知识的积累来衡量，还通过提出新问题的能力来衡量。