John Muir

"Keep not standing fix'd and rooted,
Briskly venture, briskly roam;
Head and hand, where'er thou foot it,
And stout heart are still at home.
In each land the sun does visit,
We are gay, whate'er betide:
To give room for wandering is it
That the world was made so wide."

"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."

"To the sane and free it will hardly seem necessaryto cross the continent in search of wild beauty, however easy the way, for they find it in abundance wherever they chance to be. Like Thoreau they see forests in orchards and patches of huckleberry brush, and oceans in ponds and drops of dew."
John Muir, Our National Parks

Available for your reading pleasure on Google Books
http://books.google.co.uk/books?id=XF9RI-CoZq0C&printsec=frontcover#v=onepage&q=&f=false