"By the Waters of Babylon". Post-apocalyptic short story by Stephen Vincent Benet (first published in "The Saturday Evening Post" as "The Place of the Gods"), July 31, 1937.
Jean de La Bruyère, Luc de Clapiers marquis de Vauvenargues (1903). “La Bruyère and Vauvenargues: Selections from the Characters, Reflexions and Maxims”
"Horizon (The Pleasure of Finding Things Out)". Documentary (November 23, 1981), later published in "No Ordinary Genius: The Illustrated Richard Feynman" edited by Christopher Sykes (p. 239), 1994.
Thomas De Quincey, James Thomas Fields (1854). “De Quincey's Writings: Essays on philosophical writers and other men of letters. 1854-60. [v. 14 stereotyped”, p.103
Epictetus (1758). “All the Works of Epictetus: Which are Now Extant; Consisting of His Discourses, Preserved by Arrian, in Four Books, the Enchiridion, and Fragments”, p.227