Neither by nature, then, nor contrary to nature do the virtues arise in us; rather we are adapted by nature to receive them, and are made perfect by habit.

Aristotle. Quoted in The Lives of Eminent Philosophers, written by Diogenes Laërtius, translated by Pamela Mensch, edited by James Miller. Oxford University Press, 2018, bk. 5, ch. 1, sect. 17.

Bacon, Francis. The New Organon. Translated by Michael Silverthorne. Cambridge UP, 2000, bk. 1, no. 49.

Augustine of Hippo. Confessions, translated by R. S. Pine-Coffin. Penguin Classics, 1961, bk. 8, ch. 7.

Homer. The Odyssey, edited by Bernard Knox, translated by Robert Fagles. Penguin Classics, 2006, bk. 8, l. 479-481.