Richard Erdoes said this quote

I think it was a sense of being completely swallowed up by nature that gave the prairie its powerful attraction.There is nothing like it in all of Europe. Even high up on a Swiss glacier one is still conscious of the toy villages below, the carefully groomed landscape of multicolored fields,the faraway ringing of a church bell. It is all very beautiful, but it does not convey the utmost escape. I believe, with the Indians, that a landscape influences and forms the people living on it and that one cannot understand them and make friends with them without also understanding, and making friends with, the earth from which they came.