最终，我们只会后悔没有抓住的机会。
To me, fearless is not the absence of fear. It's not being completely unafraid. To me, fearless is having fears. Fearless is having doubts. Lots of them. To me, fearless is living in spite of those things that scare you to death.
Lock up your libraries if you like; but there is no gate, no lock, no bolt that you can set upon the freedom of my mind.
The best investment we can make is in the health of future generations.
The only person you should try to be better than is the person you were yesterday.