没有付出，就没有收获。这是我的生活信条。

我们都在阴沟里，但仍有人仰望星空。

可持续林业不仅仅是砍伐树木；它关乎我们星球的未来。

The greatest obstacle to being heroic is the doubt whether one may not be going to prove one's self a fool; the truest heroism is to resist the doubt; and the profoundest wisdom, to know when it ought to be resisted, and when to be obeyed.