活着是世界上最罕见的事情。大多数人只是存在，仅此而已。

Science cannot solve the ultimate mystery of nature. And that is because, in the last analysis, we ourselves are part of nature and therefore part of the mystery that we are trying to solve.

The true value of a forest can never be measured in board feet alone.

真正的领导力是在别人都不愿意时做出艰难的决定。

你得先学会爬才能走，先学会走才能跑。