用心不能杂乱，杂乱则心神恍惚不能集中；用心不要劳累，劳累则精神疲倦不能有所收获。

And I urge you to please notice when you are happy, and exclaim or murmur or think at some point, 'If this isn't nice, I don't know what is.'

The boundary between physics and mathematics is not as clear-cut as we might think.

郦波在讲座中引用马克·吐温的话并加以阐释

The only limit to our realization of tomorrow will be our doubts of today.

I do not lack the courage to think a thought all the way through, and thus far I have encountered no thought that I have feared.

最好的故事是那些让你有所感触的故事。

看着容易，要学会就很难；千万不要把容易得到的东西看得普通，就不知道珍惜。