Nature must be viewed humanly to be viewed at all; that is, her scenes must be associated with humane affections, such as are associated with one's native place. She is most significant to a lover. A lover of Nature is preeminently a lover of man. If I have no friend, what is Nature to me? She ceases to be morally significant. . .
Henry David ThoreauIn all her products, Nature only develops her simplest germs. One would say that it was no great stretch of invention to create birds. The hawk which now takes his flight over the top of the wood was at first, perchance, only a leaf which fluttered in its aisles. From rustling leaves she came in the course of ages to the loftier flight and clear carol of the bird.
Henry David ThoreauIt is only necessary that man should start a fence that Nature should carry it on and complete it. The farmer cannot plow quite up to the rails or wall which he himself has placed, and hence it often becomes a hedgerow and sometimes a coppice.
Henry David Thoreau