The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

The knowledge that you have emerged wiser and stronger from setbacks means that you are, ever after, secure in your ability to survive. You will never truly know yourself, or the strength of your relationships, until both have been tested by adversity. Such knowledge is a true gift, for all that it is painfully won, and it has been worth more than any qualification I ever earned.

我相信可互换零件的原理将在未来制造业的进步中发挥巨大作用。

"Happiness is not something ready made. It comes from your own actions."

体育绝不能被视为奢侈品。