The real test of a financial model is not how complex it is, but how well it captures the essential features of the economic problem.
金融模型的真正考验不在于它有多复杂，而在于它是否能很好地捕捉经济问题的本质特征。
投机把你引向错误的道路。它允许你把你的情绪放在第一位，而投资则把情绪排除在外。
创新是看到每个人都看到的东西，思考没有人想过的东西。
创造力需要勇气。
Art is not what you see, but what you make others see.
可持续性不是成本；而是对我们共同未来的投资。
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！"