In metaphysics, the notion that earth and all that's on it is a mental construct is the product of people who spend their lives inside rooms. It is an indoor philosophy.

it will be objected that a constantly increasing population makes resistance and conservation a hopeless battle. this is true. unless a way is found to stabilize the nation's population, the parks can not be saved. or anything else worth a damn. wilderness preservation, like a hundred other good causes, will be forgotten under the overwhelming pressure of a struggle for mere survival and sanity in a completely urbanized, completely industrialized, ever more crowded environment. for my own part i would rather take my chances in a thermonuclear war than live in such a world.

I would never betray a friend to serve a cause. Never reject a friend to help an institution. Great nations may fall in ruin before I would sell a friend to save them.

A cowboy is a farm boy in leather britches and a comical hat.

For myself I hold no preferences among flowers, so long as they are wild, free, spontaneous. Bricks to all greenhouses! Black thumb and cutworm to the potted plant!

If a man’s imagination were not so weak, so easily tired, if his capacity for wonder not so limited, he would abandon forever such fantasies of the supernal. He would learn to perceive in water, leaves and silence more than sufficient of the absolute and marvelous, more than enough to console him for the loss of the ancient dream.

What did Jesus say to the headwaiter at the Last Supper? 'Separate checks, please.'