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！"

A majority of life's errors are caused by forgetting what one is really trying to do.

有道德的人能够反思自己过去的行为及其动机。

"The purpose of computing is insight, not numbers."

人生苦短，必须快乐。

只有准备充分，才可能成功。

表演不是关于成为不同的人。它是在明显不同的事物中找到相似之处，然后在那里找到自己。

因果推断不仅仅是统计显著性；它关乎理解数字背后的机制。