(Michel de Montaigne (1533-1592), French essayist. "That to philosophize is to learn to die," ch. 20, p. 75, The Essays of Montaigne, vol. I, trans. by E.J. Trechmann, Oxford University Press, New York and London (n.d.).
Montaigne's appraisal of philosophy.)
(Julius Caesar [Gaius Julius Caesar] (100-44 B.C.), Roman general, emperor. Parallel Lives, "Caesar", sct. 32, Plutarch.
Julius Caesar on crossing the Rubicon in 49 B.C., an action which provoked the start of the first Civil War.)
(Thomas Appleton (1812-1884), U.S. author. Quoted in The Autocrat of the Breakfast-Table, ch. 6, Oliver Wendell Holmes Sr. (1858).
The saying also found its way into Oscar Wilde's The Picture of Dorian Gray, ch. 3 (1891) and A Woman of No Importance, act 1 (1893).)