The secret of change is to focus all of your energy not on fighting the old, but on building the new.

The fountain of content must spring up in the mind, and they who have so little knowledge of human nature as to seek happiness by changing anything but their own dispositions will waste their lives in fruitless efforts.

老鼠和人之间的唯一区别是老鼠会从经验中学习。

I was seldom able to see an opportunity until it had ceased to be one.

The power of abstraction is that it allows us to ignore details that are not relevant to the task at hand.

The answers to our future lie buried in our past.