Human nature
Virgil. Aenē̆is [Aeneid]. 19 BC, bk. 3.
Virgil. The Aeneid, translated by Robert Fagles. Penguin Classics, 2010, bk. 3.
Tolstoy, Leo. Анна Каренина [Anna Karenina]. The Russian Messenger, 1875-1877. Serial.
Tolstoy, Leo. Anna Karenina, translated by Richard Pevear and Larissa Volokhonsky. Penguin Classics, 2014.
Shakespeare, William. "Hamlet." Mr. William Shakespeare's Comedies, Histories, & Tragedies. London: Edward Blount and William and Isaac Jaggard, 1623, act 4, sc. 4.
Shakespeare, William. "Hamlet." The Norton Shakespeare, edited by Stephen Greenblatt, et al., 3rd ed., W. W. Norton & Company, 2015, act 4, sc. 4.
Hemingway, Ernest. The Old Man and the Sea. Charles Scribner's Sons, 1952.
Twain, Mark. Following the Equator: A Journey Around the World. Hartford: American Publishing Company, 1897, ch. 14.
Twain, Mark. "Following the Equator." Mark Twain: A Tramp Abroad, Following the Equator, Other Travels, edited by Roy Blount Jr. Library of America, 2010, ch. 14.
Franklin, Benjamin [published as Richard Saunders]. Poor Richard's Almanack. Philadelphia, 1742.
Franklin, Benjamin. "Poor Richard’s Almanack, 1742." Benjamin Franklin: Autobiography, Poor Richard, and Later Writings, edited by J. A. Leo Lemay. Library of America, 2005.
Pascal, Blaise. Pensées [Thoughts]. Paris: Chez G. Desprez, 1670, no. 129.
Pascal, Blaise. "Pensées." Pensées and Other Writings, edited by Anthony Levi, translated by Honor Levi. Oxford University Press, 2008, no. 129.
Hobbes, Thomas. De Cive [On the citizen]. Paris, 1642.
Hobbes, Thomas. Man and Citizen (De Homine and De Cive), edited by Bernard Gert. Hackett Publishing, 1991.
The Holy Bible: The King James Version. 1611. (Romans 5:12).
Johnson, Samuel. Quoted in journal entry, written by James Boswell. 3 Apr. 1776.
Johnson, Samuel. Quoted in The Life of Samuel Johnson, written by James Boswell, edited by David Womersley. Penguin Classics, 2008.
Emerson, Ralph Waldo. "Circles." Essays: First Series. Boston: James Munroe and Company, 1841.
Emerson, Ralph Waldo. "Circles (1841)." The Portable Emerson, edited by Jeffrey S. Cramer. Penguin Classics, 2014.
Twain, Mark. "Refuge of the Derelicts." Fables of Man. University of California Press, 1972.
Twain, Mark. "Refuge of the Derelicts." The Devil's Race-Track: Mark Twain's "Great Dark" Writings. University of California Press, 2005.
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.
Wilde, Oscar. "The Soul of Man Under Socialism." Fortnightly Review. London: Chapman and Hall, Feb. 1891.
Wilde, Oscar. "The Soul of Man Under Socialism." The Soul of Man Under Socialism and Selected Critical Prose, edited by Linda Dowling. Penguin Classics, 2001.
Thoreau, Henry David. "Walking." 23 Apr. 1851, Concord Lyceum, Concord, MA, USA. Lecture.
Thoreau, Henry David. "Walking." Civil Disobedience and Other Essays. Dover Publications, 1993.