I'm not afraid of dying, I'm afraid of not trying.

A sound mind in a sound body, is a short, but full description of a happy state in this World: he that has these two, has little more to wish for; and he that wants either of them, will be little the better for anything else. Men’s happiness or misery is most part of their own making. He, whose mind directs not wisely, will never take the right way; and he, whose body is crazy and feeble, will never be able to advance in it.

Sustainability requires bold vision and relentless execution.

人们并不愚蠢，只是世界很复杂。

Education is the foundation of sustainable forestry—people protect what they understand.

"Writing is like making love. Don’t worry about the orgasm, just concentrate on the process."