The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all. And that, of course, causes great confusion.
"The mind evolves to meet practical demands."
Curiosity is the engine of intellectual achievement, and humility is its compass.
自己不能胜任的事，切勿轻易答应别人;既经允诺，就必须实践自己的诺言。
贫穷不仅仅是缺钱；它是关于拥有的太少以至于你甚至无法做出正确的决定。
Don't be embarrassed by your failures, learn from them and start again.
Do what you can wherever you are， from wherever you sit in life. Give me your time or your talent your money if you have it.
On pricing: "There are two kinds of companies， those that work to try to charge more and those that work to charge less. We will be the second."