Literature is the art of expressing the inexpressible.

"Hope is the thing with feathers that perches in the soul."

Quality is not an act, it is a habit.

书籍是最安静、最恒久的朋友；它们是最易接近、最睿智的顾问，也是最耐心的老师。

我教育孩子们要独立——就像我自己一样。

语言是存在的居所。

You have to be willing to make mistakes; the big thing is to not make the same mistake over and over again.

I think that in mathematics, and maybe in life, you have to be willing to be a little bit lost.