可持续发展不仅仅是一个流行词，它是负责任的林业的基础。

"The truth is a mirror, and the mirror is a shadow."

The most sublime act is to set another before you.

"We are all products of our time, for better or worse."

我想把美国从恐惧中解放出来。我希望人们害怕真正可怕的事情，比如战争和饥荒，而不是因为邻居有不同宗教信仰就害怕他。

人类不仅会生存下去，他终将胜利。

If you're not stubborn, you'll give up on experiments too soon. And if you're not flexible, you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve.