through with Nature
...Thoreau's Journal: 23-May-1854
We soon get through with Nature. She excites an expectation which she cannot satisfy. The merest child which has rambled into a copsewood dreams of a wilderness so wild and strange and inexhaustible as nature can never show him. The red-bird which I saw on my companion’s string on election days I thought but the outmost sentinel of the wild, immortal camp,—of the wild and dazzling infantry of the wilderness,—that the deeper woods abounded with redder birds still; but, now that I have threaded all our woods and waded the swamps, I have never yet met with his compeer, still less his wilder kindred. The red-bird which is the last of nature is but the first of God.