You can't just sit there and wait for people to give you that golden dream. You've got to get out there and make it happen for yourself.

The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.

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.

真正的进步用收成和栖息地共同衡量成功。

我们必须保持警惕，坚决与一切内外敌人作斗争。