It was ready to echo the growl of a bear, the howl of a wolf, or the scream of a panther; but when you get fairly into the middle of one of these grim forests, you are surprised to find that the larger inhabitants are not at home commonly, but have left only a puny red squirrel to bark at you. — The Maine Woods—The Maine Woods
Once, when Joe had called again, and we were listening for moose, we heard come faintly echoing, or creeping from far, through the moss-clad aisles, a dull, dry, rushing sound, with a solid core to it, yet as if half smothered under the grasp of the luxuriant and fungus-like forest, like the shutting of a door in some distant entry of the damp and shaggy wilderness. — The Maine Woods—The Maine Woods
The most alive is the wildest.—"Walking"
We need the tonic of wildness—to wade sometimes in marshes where the bittern and the meadow-hen lurk, and hearing the booming of the snipe; to smell the whispering sedge where only some wilder and more solitary fowl builds her nest, and the mink crawls with its belly close to the ground.—Walden
What we call wildness is a civilization other than our own.—Journal, 16 February 1859
Whatever has not come under the sway of man is wild. In this sense original and independent men are wild—not tamed and broken by society.—Journal, 3 September 1851
When, as was commonly the case, I had none to commune with, I used to raise the echoes by striking with a paddle on the side of my boat, filling the surrounding woods with circling and dilating sound, stirring them up as the keeper of a menagerie of his wild beasts, until I elicited a growl from every wooded vale and hillside. — Walden—Walden