Courage is grace under pressure.

The ladder of success is best climbed by stepping on the rungs of opportunity.

"With a library you are free, not confined by temporary political climates. It is the most democratic of institutions because no one - but no one at all - can tell you what to read and when and how."

我不是商人，我就是生意本身。

Never say never, because limits are just illusions.

To understand mathematics is to understand the fabric of reality.

我不是专业人士，我没有专业生涯，我只是做我所做的事。