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"The challenge in theoretical computer science is not just to solve problems, but to understand why they are hard to solve."

譯文：心地純正，奸邪之人不能侵擾，行為端正，邪惡之人怎會欺辱。賞析：我們只要作風正派，光明磊落，品行端正，就不怕世間的流言蜚語，不怕小人的無端指責和謾罵。

Happiness in intelligent people is the rarest thing I know.

傳記是最親密的歷史形式。

The safest way to double your money is to fold it over once and put it in your pocket.

幸福不是目的地，而是一種生活方式。