"Nature is a personality so vast and universal that we have never seen one of her features. ... The world with which we are commonly acquainted leaves no trace, and it will have no anniversary.
-Henry David Thoreau (1817–1862), U.S. philosopher, author, naturalist. “Walking” (1862), in The Writings of Henry David Thoreau, vol. 5, p. 242, Houghton Mifflin (1906).