Wildflower corners are easy to maintain, but once gone, they are hard to rebuild.

Is it possible to preserve the element of Unknown Places in our national life? Is it practicable to do so, without undue loss in economic values? I say 'yes' to both questions. But we must act vigorously and quickly, before the remaining bits of wilderness have disappeared.

To keep every cog and wheel is the first precaution of intelligent tinkering.

Once you learn to read the land, I have no fear of what you will do to it, or with it. And I know many pleasant things it will do to you.

The rich diversity of the world's cultures reflects a corresponding diversity in the wilds that gave them birth.

There is value in any experience that exercises those ethical restraints collectively called sportsmanship.

The life of every river sings its own song, but in most the song is long marred by the discords of misuse.