预测未来的最好方法就是创造它。
我不敢说数学和疯狂之间有直接关系，但毫无疑问，伟大的数学家们都有狂躁、妄想和精神分裂的症状。
I think people believe in heaven because they don’t like the idea of dying, because they want to carry on living and they don’t like the idea that other people will move into their house and put their things into the rubbish.
Free trade is the key to the prosperity of a nation.
The strongest is never strong enough to be always the master， unless he transforms strength into right， and obedience into duty.