The ideas of economists and political philosophers， both when they are right and when they are wrong， are more powerful than is commonly understood. Indeed the world is ruled by little else. Practical men， who believe themselves to be quite exempt from any intellectual influence， are usually the slaves of some defunct economist.

The worse a situation becomes, the less it takes to turn it around, the bigger the upside.

The challenge of quantum computing is not just technical but also conceptual.

译文：一心想求取科举功名的人，不一定能体会到琴棋书画的乐趣；追求生命境界的人，不能没有经世济民的才能。赏析：读书或做事，我们不能总是带着功利性极强的目的去。目的越强，中间的乐趣无法体会，其结果往往事与愿违。如果我们抱着一颗平常心，往往会有意想不到的收获。那些道德品质高尚的人大多博学有才，他们用自身的言行去改变周围的人，去改变这个社会。

The only real mistake is the one from which we learn nothing.

写作是理解世界的一种方式。