The hidden significance of these fables which is sometimes thought to have been detected, the ethics running parallel to the poetry and history, are not so remarkable as the readiness with which they may be made to express a variety of truths. As if they were the skeletons of still older and more universal truths than any whose flesh and blood they are for the time made to wear. It is like striving to make the sun, or the wind, or the sea symbols to signify exclusively the particular thoughts of our day.
Henry David Thoreau (1817–1862), U.S. philosopher, author, naturalist. A Week on the Concord and Merrimack Rivers (1849), in The Writings of Henry David Thoreau, vol. 1, p. 61, Houghton Mifflin (1906).