A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between proofs and the best mathematician can notice analogies between theories.
现代的公众人物是拿自己私生活的非法细节让大家频打哈欠的人。
经济史告诉我们,改变是可能的,但很少是容易的。
每一个挑战都是变得更强大、更睿智的机会。