Drill down into our database of quotes.

Franklin, Benjamin. "Poor Richard’s Almanack, 1735." Benjamin Franklin: Autobiography, Poor Richard, and Later Writings, edited by J. A. Leo Lemay. Library of America, 2005.

Mill, John Stuart. "On Liberty." On Liberty, Utilitarianism and Other Essays, edited by Mark Philp and Frederick Rosen. Oxford University Press, 2015, ch. 1.

Ovid. Metamorphoses, translated by David Raeburn. Penguin Classics, 2004, bk. 3, l. 466.

Paine, Thomas. "Common Sense." Rights of Man, Common Sense, and Other Political Writings, edited by Mark Philp. Oxford University Press, 2009, sect. 2.

Nietzsche, Friedrich. Beyond Good and Evil, translated by R. J. Hollingdale. Penguin Classics, 2003, ch. 4, no. 157.

Locke, John. An Essay Concerning Human Understanding, edited by Pauline Phemister. Oxford University Press, 2008, bk. 2, ch. 1, sect. 15.

Blake, William. "The Marriage of Heaven and Hell." The Complete Poetry and Prose of William Blake, edited by David V. Erdman. University of California Press, 2008.

Hume, David. "Sceptical Solution of These Doubts." An Enquiry Concerning Human Understanding, edited by Tom L. Beauchamp. Oxford University Press, 2000, sect. 5, pt. 1, para. 6.

Socrates. Quoted in "Phaedo." Plato: Five Dialogues: Euthyphro, Apology, Crito, Meno, Phaedo, written by Plato, translated by G. M. A. Grube and John M. Cooper. Hackett Publishing, 2002.

Blake, William. "The Marriage of Heaven and Hell." The Complete Poetry and Prose of William Blake, edited by David V. Erdman. University of California Press, 2008.

Sophocles. "Oedipus Rex." The Oedipus Cycle: Oedipus Rex; Oedipus at Colonus; Antigone, translated by Dudley Fitts and Robert Fitzgerald. Mariner Books, 2002.

Wilde, Oscar. The Picture of Dorian Gray, edited by Robert Mighall. Penguin Classics, 2003, ch. 8.

Juvenal. The Satires, translated by Niall Rudd. Oxford University Press, 2008, satire 10.

Socrates. Quoted in "Phaedo." Plato: Five Dialogues: Euthyphro, Apology, Crito, Meno, Phaedo, written by Plato, translated by G. M. A. Grube and John M. Cooper. Hackett Publishing, 2002.