Man is only a reed, the weakest thing in nature; but he is a thinking reed.

Pascal, Blaise. "Pensées." Pensées and Other Writings, edited by Anthony Levi, translated by Honor Levi. Oxford University Press, 2008, no. 895.

"Paradise Lost." John Milton: Major Works, edited by Stephen Orgel and Jonathan Goldberg. Oxford University Press, 2008, bk. 9, I. 896.

Plato. Theatetus, translated by John McDowell. Oxford University Press, 2014.

Gide, Andre. The Counterfeiters, translated by Dorothy Bussy. Penguin Books, 1990, pt. 3, ch. 16.