It seems to me that the natural world is the greatest source of excitement; the greatest source of visual beauty; the greatest source of intellectual interest. It is the greatest source of so much in life that makes life worth living.

请务必花时间阅读纪念碑旁边的铭文细节。

永远不要停止学习。世界总是在变化，你必须随之改变。

我从未打算创造一个经典。我只是想讲一个故事。