The commonest and cheapest sounds, as the barking of a dog, produce the same effect on fresh and healthy ears that the rarest music does. It depends on your appetite for sound. Just as a crust is sweeter to a healthy appetite than confectionery to a pampered or diseased one.
Henry David Thoreau, Wesley T. Mott, Elizabeth Marshall Thomas (2005). “Bonds of Affection: Thoreau on Dogs and Cats”, p.32, Univ of Massachusetts Press
