I am moved whenever I read an apt quote about the wild or the outdoors.  Muir, the consummate outdoorsman, captured best the sentiment:

“The tendency nowadays to wander in wilderness is delightful to see.  Thousands of tired, nerve-shaken, over-civilized people are beginning to find out that going to the mountains is going home; that wildness is a necessity; and that mountain parks and reservations are useful not only as fountains of timber and irrigating rivers, but as fountains of life.  Awakening from the stupefying effects of the vice of over-industry and the deadly apathy of luxury, they are trying as best they can to mix and enrich their little ongoings with those of nature, and to rid of rust and disease.”

– John Muir, The Atlantic Monthly, August 1897