最大的风险就是不冒任何风险。在一个快速变化的世界里，唯一注定失败的策略就是不冒险。

The rise of China and the resurgence of Russia have challenged the idea that liberal democracy is the only viable form of government.

The best way to test a program is to test it.

Always look for the positive in every situation. There is always something to be grateful for.

The only limit to our realization of tomorrow is our doubts of today.

I was working at a financial firm in New York City with a bunch of very smart people， and I had a brilliant boss that I much admired. I went to my boss and told him I wanted to start a company selling books on the Internet. He took me on a long walk in Central Park， listened carefully to me， and finally said， "That sounds like a really good idea， but it would be an even better idea for someone who didn't already have a good job." That logic made some sense to me， and he convinced me to think about it for 48 hours before making a final decision. Seen in that light， it really was a difficult choice， but ultimately， I decided I had to give it a shot. I didn't think I'd regret trying and failing. And I suspected I would always be haunted by a decision to not try at all. After much consideration， I took the less safe path to follow my passion， and I'm proud of that choice.

聪明人说话，是因为有些话要说；蠢人说话，则因为要说些话。

拥有好主意的最佳方法是拥有很多主意。