The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as in poetry.

We are all hostages of our own time.

To write is to make the invisible visible.

最重要的是享受你的生活——快乐——这才是最重要的。

Every great engineering achievement starts with a clear vision.

语言中最具破坏性的一句话是：“我们一直都是这样做的。”