Joseph Addison (1794). “Interesting Anecdotes, Memoirs, Allegories, Essays, and Poetical Fragments: Tending to Amuse the Fancy, and Inculcate Morality”, p.286
M. Scott Peck (2002). “The Road Less Traveled, 25th Anniversary Edition: A New Psychology of Love, Traditional Values, and Spiritual Growth”, p.97, Simon and Schuster