In the cloister, under the eyes of the brethren who read there, what profit is there in those ridiculous monsters, in that marvellous and deformed beauty, that beautiful deformity? To what purpose are those unclean apes, those fierce lions, those monstrous centaurs, those half-men, those striped tigers, those fighting knights, those hunters winding their horns.
letter to William, Abbot of St-Thierry, c.1125