2001：贝索斯致股东信《我们始终坚持现金流为王》

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.

"The best way to find out if you can trust somebody is to trust them."