你唯一需要超越的人就是昨天的自己。
A man of genius makes no mistakes. His errors are volitional and are the portals of discovery.
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！"
如果没有机械的帮助，一天的劳动不足以生产一磅棉花。
过去是一个跟随我们的影子，总是存在，总是影响。
Love is the ability and willingness to allow those that you care for to be what they choose for themselves without any insistence that they satisfy you.
Never be the brightest person in the room; if you are, you're in the wrong room.
