Latin
Saint Jerome. Letter to Laeta. c. 403, sect. 4.
Saint Jerome. "Letter CVII." Select Letters of Saint Jerome. Aeterna Press, 2015, sect. 4.
Catullus, Gaius Valerius. Carmina. c. 1481, no. 85.
Cattulus, Gaius Valerius. The Poems of Catullus, translated by Guy Lee. Oxford University Press, 2009, no. 85.
Quintilian. Institutio Oratoria [Institutes of Oratory]. c. 95 AD, bk. 1, ch. 12, sect. 5.
Livy. Ab urbe condita [From the Founding of the City]. c. 9 BC, bk. 34, ch. 2, sect. 12.
Livy. Rome and the Mediterranean: History of Rome from Its Foundation, books 31-45, translated by Henry Bettenson. Penguin Classics, 1976, bk. 34, ch. 2.
Horace. Carmina [Odes]. 23 BC, bk. 3, no. 29.
Horace. "Odes." The Complete Odes and Epodes, translated by David West. Oxford University Press, 2008, bk. 3, no. 29.
Horace. Epistularum liber primus [First Book of Letters]. 20 BC, bk. 1, epistle 19.
Horace. "Epistles." Satires and Epistles, translated by John Davie. Oxford University Press, 2011, bk. 1, epistle 19.
Seneca the Younger. Epistulae Morales ad Lucilium [Moral Letters to Lucilius]. c. 65 AD.
Seneca, Lucius Annaeus. Letters on Ethics, translated by Margaret Graver and A. A. Long. University of Chicago Press, 2017.
Quintus Ennius. Quoted in De Natura Deorum [On the Nature of the Gods], written by Cicero. c. 45 BC, bk. 1.
Quintus Ennius. Quoted in The Nature of the Gods, written by Cicero, translated by P. G. Walsh. Oxford University Press, 2008, bk. 1.
Pliny the Elder. Historia Naturalis [Natural History]. 77 AD, bk. 1.
Pliny the Elder. Natural History: A Selection, translated by John F. Healy. Penguin Classics, 1991, bk. 1.
Cato the Elder. De Agricultura [On Agriculture]. c. 160 BC, ch. 1, sect. 6.
Cato the Elder. "On Agriculture." Cato and Varro: On Agriculture, translated by W. D. Hooper and H. B. Ash. Harvard University Press, 1934, ch. 1, sect. 6.
Carus, Titus Lucretius. De Rerum Natura [On the Nature of Things]. c. 55 BC, bk. 1, l. 518.
Carus, Titus Lucretius. The Nature of Things, translated by Alicia Stallings. Penguin Classics, 2007, bk. 1, l. 518.
Terence. Eunuchus [The Eunuch]. 161 BC, Megalesian Games, Rome, Italy, act 4, sc. 7.
Romulus. Quoted in Saturae [Satires], written by Horace. c. 35 BC, bk. 2.
Romulus. Quoted in Satires and Epistles, written by Horace, translated by John Davie. Oxford University Press, 2011, bk. 2.
Cicero, Marcus Tullius. Pro Milone [In Defense of Milo]. c. 52 BC, sect. 10.
Cicero, Marcus Tullius. Pro Milone [For Milo], translated by D. H. Berry. Oxford University Press, 2009, sect. 10.
Spinoza, Baruch. Ethica, Ordine Geometrico Desmonstrata [Ethics, Demonstrated in Geometrical Order]. 1677, pt. 4, prop. 68.
Spinoza, Benedict. Ethics, translated by Michael Silverthorne and Matthew J. Kinser. Cambridge University Press, 2018, pt. 4, prop. 68.
Petronius. Satyricon, Satyricon liber [The Book of Satyrlike Adventures]. c. 1st century AD, sect. 94.
Petronius. "The Satyricon." The Satyricon and The Apocolocyntosis of the Divine Claudius, translated by J. P. Sullivan. Penguin Classics, 1986, sect. 94.
Bede. Historia ecclesiastica gentis Anglorum [Ecclesiastical History of the English People]. c. 731, bk. 2, ch. 13.
Bede. "Ecclesiastical History of the English People." The Ecclesiastical History of the English People; The Greater Chronicle; Bede's Letter to Egbert, edited by Judith McClure and Roger Collins. Oxford University Press, 2009, bk. 2, ch. 13.
Themistocles. Quoted in Epistulae ad Atticum [Letters to Atticus], by Marcus Tullius Cicero. 1 century BC, bk. 10, no. 8.
Themistocles. Quoted in Cicero: Letters to Atticus, by Marcus Tullius Cicero, translated by D. R. Shackleton Bailey. Vol. 2, Harvard, University Press, 1999, bk. 10, no. 8.
Bacon, Francis. The Advancement of Learning. London: Oxford: Rob Youn and Ed Forrest, 1605, bk. 6, ch. 3, no. 31.
Bacon, Francis. "The Advancement of Learning." Francis Bacon: The Major Works, edited by Brian Vickers. Oxford University Press, 2008, bk. 6, ch. 3, no. 31.
Cicero, Marcus Tullius. De Oratore [On the Orator]. c. 55 BC, bk. 2, ch. 9, sect. 36.
Cicero, Marcus Tullius. Cicero: On the Orator, Books I-II, translated by E. W. Sutton and H. Rackham. Harvard University Press, 1948, bk. 2, ch. 9, sect. 36.