A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between theories and the best mathematician can notice analogies between analogies.
数学家是能在定理间找到类比的人；更好的数学家能在理论间看到类比；而最优秀的数学家能注意到类比之间的类比。
When you say 'yes' to others, make sure you are not saying 'no' to yourself.
欲望不是要被理解的东西。它是要被忍受的东西。
Science is about pushing boundaries, both in knowledge and technology.
The beauty of literature is that it allows us to live multiple lives, to experience different worlds, to feel the emotions of others.
Every time I write a book, every time I face that blank page, I’m convinced that I can’t do it.
Success is a journey, not a destination.
At that age， I'd take any excuse to make estimates and do minor arithmetic. I'd calculate our gas mileage -- figure out useless statistics on things like grocery spending. I'd been hearing an ad campaign about smoking. I can't remember the details， but basically the ad said， every puff of a cigarette takes some number of minutes off of your life: I think it might have been two minutes per puff. At any rate， I decided to do the math for my grandmother. I estimated the number of cigarettes per days， estimated the number of puffs per cigarette and so on. When I was satisfied that I'd come up with a reasonable number， I poked my head into the front of the car， tapped my grandmother on the shoulder， and proudly proclaimed， "At two minutes per puff， you've taken nine years off your life！"