Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.

勤勉：不要浪费时间，只做有用的事情，戒除一切不必要的行为。

The past is always tense, the future perfect.

"A journey is a person in itself; no two are alike. And all plans, safeguards, policing, and coercion are fruitless. We find after years of struggle that we do not take a trip; a trip takes us."

对我们星球最大的威胁是相信别人会拯救它。