北美国家公园全纪录

As long as I live I'll hear the birds and the winds and the waterfalls sing. I'll interpret the rocks and learn the language of flood and storm and avalanche. I'll make the acquaintance of the wild gardens and the glaciers and get as near to the heart of this world as I could. And so I did. I sauntered about from rock to rock, from grove to grove, from stream to stream, and whenever I met a new plant I would sit down beside it for a minute or a day, to make its acquaintance, hear what it had to tell. I asked the boulders where they had been and whither they were going, and when night found me, there I camped. I took no more heed to save time or to make haste than did the trees or the stars. This is true freedom, a good, practical sort of immortality.

—— John Muir

只要我还活着，我就要倾听鸟鸣，清风和瀑布的歌唱。我要解读岩石，学习洪水，风暴，和雪崩的语言。我要认识原野和冰川，尽我所能接近这世界的中心。我也是这么做的。我徘徊于石头，树林，和溪流。我只要见到一种新的植物，就挨着它坐下，坐上一分钟或者是一整天，去结识它，听听它有什么要说的。我问巨石它们到过哪里，又要去往何方。黑夜来到我身边的时候，我就原地露营。我不比树木更刻意地惜时，也不比星辰更匆忙。这是真正的自由，一种良善的，实在的不朽。

——约翰•穆尔