What is the cat?" he exclaimed. "It is a corrective. God, having made the mouse, said, 'I've made a blunder.' And he made the cat. The cat is the erratum of the mouse. The mouse, plus the cat, Is the revised and corrected proof of creation.

Les Misérables, Volume V of V, Jean Valjean (ed. Read Books Ltd, 2016) - ISBN: 9781473350441