Fausto Appetente Die §5

⁵ The value of this knowledge of Divine things not long after was to be seen in his disputations against the heretics. They were armed with all arts and fallacies to attack the dogmas of Faith; yet with wonderful success he confounded and refuted them. This appeared especially at Toulouse, the head and center of the heresies, where the most learned of the adversaries had come together. It is recorded that he, with his first companions, powerful in word and work, invincibly withstood the insolence of the heretics. Indeed, not only did he withstand their strength, but he so softened their spirits by his eloquence and charity that he recalled an immense number to the bosom of the Church. God Himself was ever at hand to aid him in his battle for the Faith. Thus, having accepted the challenge of the heretics that each should consign his book to the flames, his book alone remained untouched by the fire. Thus by the valor of Dominic Europe was freed from the danger of the Albigensian heresy.