数学家是能在定理间找到类比的人；更好的数学家能在理论间看到类比；而最优秀的数学家能注意到类比之间的类比。
A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between theories and the best mathematician can notice analogies between analogies.
你能给予他人的最伟大的礼物就是你的时间，因为你正在给予他们你生命中永远不会再回来的一部分。
The secret of happiness is freedom, and the secret of freedom is courage.
"A personality is a full Congress of orators and pressure-groups, of children, demagogues, communists, isolationists, war-mongers, mugwumps, grafters, prayer-meetings, spiritualists, and astrologers."
生命最伟大的礼物是能够想象它的另一种可能。
债券市场是市场情绪的最终指标。
