English literature, from the days of the minstrels to the Lake Poets,--Chaucer and Spenser and Milton, and even Shakespeare, included,--breathes no quite fresh and, in this sense, wild strain. It is an essentially tame and civilized literature, reflecting Greece and Rome. Her wildness is a greenwood, her wild man a Robin Hood. There is plenty of genial love of Nature, but not so much of Nature herself. Her chronicles inform us when her wild animals, but not the wild man in her, became extinct.
Henry David ThoreauBut there are spirits of a yet more liberal culture, to whom no simplicity is barren. There are not only stately pines, but fragile flowers, like the orchises, commonly described as too delicate for cultivation, which derive their nutriment from the crudest mass of peat. These remind us, that, not only for strength, but for beauty, the poet must, from time to time, travel the logger's path and the Indian's trail, to drink at some new and more bracing fountain of the Muses, far in the recesses of the wilderness.
Henry David Thoreau