The dangerous man is the one who has only one idea, because then he'll fight and die for it.

The past is never dead. It's not even past.

有些书最好的部份仅止于封面与书背。

"Libraries are the treasure chests of the world."

科学家不是给出正确答案的人，而是提出正确问题的人。

Solving a problem simply means representing it so as to make the solution transparent.

我不是因为快乐而唱歌；我因为唱歌而快乐。

译文：行善作恶到头来都会有报应，只是来得早和来得晚而已。赏析：人要多做善事，不做恶事，每个人都要为自己的行为买单。做善事，自然就会得到别人的尊重和欣赏，做恶事，就会受到别人的谴责和咒骂。