"... We need wilderness preserved--as much of it as is still left, and as many kinds--because it was the challenge against which our character as a people was formed. The reminder and the reassurance that it is still there is good for our spiritual health even if we never once in ten years set foot in it. It is good for us when we are young, because of the incomparable sanity it can bring briefly, as vacation and rest, into our insane lives. It is important to us when we are old simply because it is there--important, that is, simply as an idea." - Wallace Stegner

Your comment reminded me of this excerpt of a letter to the American Congress about environmental preservation.