"Writing is a way of thinking with the fingers."

表示论提供了表达许多数论现象的语言。

Innovation is not just about technology; it's about changing the way people think and work.

It's difficult to extract sense from strings, but they're the only communication coin we can count on.

古代学者在内心涵养上下功夫，所以表现在外表上便是德高望重的标志；今天的学者在外表上下功夫，对于内心涵养，则显出实际德行的缺陷。

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.