"The truth is rarely pure and never simple."

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

Happiness is the journey, not the destination.

写文章的方法，必须先确立大的方面，然后才能顾及小的细节。

心理学家必须描述，而非解释。

Free vaccines are more valuable than expensive treatments, yet harder to promote.

跨行业合作是解决环境挑战的关键。