Life is a long ache which rarely sleeps and can never be cured.
La vie est une longue blessure qui s'endort rarement et ne se guérit jamais.
Original text (French)
Notes from Wikiquote
Letter to Pierre-François Bocage, (23 February 1845), published in Georges Lubin (ed.) Correspondance (Paris: Garnier Freres, 1964-95) vol. 6, p. 807; André Maurois (trans. Gerard Hopkins) Lélia: The Life of George Sand (New York: Harper, 1954) p. 292.