最可持续的森林是依赖它的社区所重视的森林。

爱是一种推动我们继续前进的力量，尽管一切。

The 40% solution: The capacity to increase happiness is within our personal control.

要快乐，我们不必太在意别人。

A man is like a fraction whose numerator is what he is and whose denominator is what he thinks of himself. The larger the denominator, the smaller the fraction.

我们对月球表面的了解比对海底的了解还要多。