One lives but once in this world.

Von Goethe, Johann Wolfgang. "The Sorrows of Young Werther." The Sorrows of Young Werther and Selected Writings, translated by Catherin Hutter. Signet, 2013.

Paine, Thomas. "Common Sense." Rights of Man, Common Sense, and Other Political Writings, edited by Mark Philp. Oxford University Press, 2009, sect. 3.

Carroll, Lewis. "Through the Looking-Glass." Alice's Adventures in Wonderland & Through the Looking-Glass. Macmillan Collector's Library, 2016, ch. 12.

Nietzsche, Friedrich. Nietzsche: Thus Spoke Zarathustra, edited by Robert Pippin, translated by Adrian Del Caro. Cambridge University Press, 2006, pt. 1.