改变令人不适，但它是进步的必要条件。

Syntactic sugar causes cancer of the semicolon.

If you want to make a difference, you have to be willing to take risks.

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！"

"I don't write for children. I write for people."

Success is not final, failure is not fatal: It is the courage to continue that counts.

最好的领导者是那些听比说更多的人。