Diligence is the mother of good fortune, and idleness, its opposite, never led to good intention's goal.
Authentication Score 2
Cervantes Saavedra, Miguel. El ingenioso caballero don Quijote de la Mancha [The Ingenious Gentleman Don Quixote of La Mancha]. 1605, pt. 2, ch. 43.
Cervantes Saavedra, Miguel. Don Quixote. Translated by John Rutherford. Penguin, 2003, pt. 2, ch. 20.