I had ambition not only to go farther than any man had been before, but as far as it was possible for a man to go.

Technology in forestry has evolved from chainsaws to satellites, but our responsibility remains the same.

和那些叫喊饥饿的人相比，那么吃饱了自然就快乐；和呼叫寒冷的人相比，那么得到温暖自然就快乐；和患病者相比，那么健康就会快乐；和祸患者相比，那么平安就快乐；和死去的人相比，活着就会快乐。

There is nothing more deceptive than an obvious fact.

To collect is to gather things to yourself, to take things from the world and make them part of your own story.

In mathematics, the journey is often more important than the destination.

我相信艺术有改变意识的力量。