A key work of early Christian literature, in which Irenaeus argues against the Gnostic heresy that threatened to undermine the teachings of the Church. This third book focuses on the teachings of the apostles and the authority of the Church as embodied in the succession of bishops. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.