The best investment you can make is in yourself.

I can’t play bridge. I don’t play tennis. All those things that people learn, and I admire, there hasn’t seemed time for. But what there is time for is looking out the window.

自信是最好的装扮。

Simplicity is the ultimate sophistication.

怀疑是通向真理的第一步。

数学家研究纯数学不是因为它有用；他研究它是因为他喜欢它，他喜欢它是因为它美丽。