Nature of progress
Shaw, George Bernard. "Man and Superman: Maxims for Revolutionists." Man and Superman, John Bull's Other Island, and Major Barbara. Oxford University Press, 2021. Originally published by Archibald and Constable Co., Ltd., 1903.
Milton, John, [published anonymously]. The Doctrine and Discipline of Divorce: Restor'd to the Good of Both Sexes, From the Bondage of Canon Law. London: T. P. and M. S., 1643.
Milton, John. "The Doctrine and Discipline of Divorce." John Milton: The Major Works, edited by Stephen Orgel and Jonathan Goldberg. Oxford University Press, 2008.
Baudelaire, Charles. Mon Coeur mis a nu [My Naked Heart]. Paris, 1887, no. 15.
Baudelaire, Charles. "My Heart Laid Bare." Late Fragments: Flares, My Heart Laid Bare, Prose Poems, Belgium Disrobed, translated by Richard Sieburth. Yale University Press, 2022, no. 15.
Quoting Martin Luther King, Jr., who likely was paraphrasing a quote by Theodore Parker in 1853.
King, Martin Luther, Jr. "Keep Moving From This Mountain." 25 Feb. 1965, Temple Israel of Hollywood, Los Angeles, CA, USA.
Kennedy, John F. "Inaugural Address." 20 Jan. 1961, East Portico, US Capitol Building, Washington, DC, USA.
Coleridge, Samuel Taylor. Biographia Literaria, edited by Niger Leask. Vol. 1, London: J. M. Dent, 1817, ch. 1.
Coleridge, Samuel Taylor. "Biographia Literaria." Samuel Taylor Coleridge: The Major Works, edited by H. J. Jackson. Oxford University Press, 2009, ch. 1.
Townshend, Peter. Won't Get Fooled Again. Performed by The Who. Track Records/Decca Records, 1971.
Berlin, Isaiah. "The Philosophical Ideas of Giambattista Vico." Vico and Herder: Two Studies in the History of Ideas. Viking Press/Hogarth, 1976, pt. 1.
An Introduction to Mathematics
Whitehead, Alfred North. An Introduction to Mathematics. Henry Holt and Company/Williams and Norgate, 1911, ch. 5.
Eisenhower, Dwight D. "First Inaugural Address." 20 Jan. 1953, East Portico, US Capitol Building, Washington, DC, USA.
Carus, Titus Lucretius. De Rerum Natura [On the Nature of Things]. c. 55 BC, bk. 1, l. 1117.
Carus, Titus Lucretius. The Nature of Things, translated by Alicia Stallings. Penguin Classics, 2007, bk. 1, l. 1117.