The world is a cow that is hard to milk,—life does not come so easy,—and oh, how thinly it is watered ere we get it!
Henry David Thoreau
Henry David Thoreau (1817–1862), U.S. philosopher, author, naturalist. Letter, November 14, 1847, to Ralph Waldo Emerson, in The Writings of Henry David Thoreau, vol. 6, p. 135, Houghton Mifflin (1906).