数学的目标不是解决问题，而是理解问题。

Words are traps, we step into them without knowing.

There is an awful lot you can tell about a person by their shoes. Where they're going. Where they've been.

我不会打桥牌。我不打网球。所有那些人们学习的东西，我都很钦佩，但似乎没有时间。但有的是时间看窗外。

Safety isn’t just a policy—it’s a culture that starts at the top.

The only thing that scares me more than space aliens is the idea that there aren't any space aliens. We can't be the best that creation has to offer. I pray we're not all there is. If so, we're in big trouble.

The best way to be successful is to never give up.