In the middle of difficulty lies opportunity.

在算法的领域中，效率不仅仅是一个目标；它是一种必需。

A proof of a proposition is a process the nature of which is such as to produce in us a belief in that proposition.

对抗压力的最强大武器是我们选择一个思想而非另一个的能力。

I got the idea to start Amazon 16 years ago. I came across the fact that Web usage was growing at 2，300 percent per year. I'd never seen or heard of anything that grew that fast， and the idea of building an online bookstore with millions of titles -- something that simply couldn't exist in the physical world -- was very exciting to me. I had just turned 30 years old， and I'd been married for a year. I told my wife MacKenzie that I wanted to quit my job and go do this crazy thing that probably wouldn't work since most startups don't， and I wasn't sure what would happen after that. MacKenzie (also a Princeton grad and sitting here in the second row) told me I should go for it. As a young boy， I'd been a garage inventor. I'd invented an automatic gate closer out of cement-filled tires， a solar cooker that didn't work very well out of an umbrella and tinfoil， baking-pan alarms to entrap my siblings. I'd always wanted to be an inventor， and she wanted me to follow my passion.

所以我这辈子不断地实践那种跨学科的方法。这种习惯帮了我很多忙，它让生活更有乐趣，让我能做更多的事情，让我变得更有建设性，让我变得非常富有。

写中美洲就是写世界的心脏，尽管这颗心脏在流血。

It seemed the world was divided into good and bad people. The good ones slept better ... while the bad ones seemed to enjoy the waking hours much more.