The greatest obstacle to being heroic is the doubt whether one may not be going to prove one's self a fool; the truest heroism is to resist the doubt; and the profoundest wisdom, to know when it ought to be resisted, and when to be obeyed.
一个人重要的是他谈论什么、而不是他赞同或不赞同什么。
2012年:贝索斯致股东信《长远思考才能做到不可能的事情》
The greatest discoveries in mathematics are those that unify seemingly unrelated ideas.