The Epistle of Ignatius to the Ephesians (Long Version)
Chapter 7: Beware of False Teachers
But some worthless people are in the habit of carrying around the name [of Jesus Christ] in wicked deceit, while they practice things unworthy of God and hold opinions contrary to the doctrine of Christ, to their own destruction and that of those who believe them, whom you must avoid as you would wild beasts. For “the righteous person who avoids them is saved forever; but the destruction of the ungodly is sudden and a cause for rejoicing.” For “they are dumb dogs that cannot bark,” raving mad and biting secretly, against whom you must be on your guard, since they suffer from an incurable disease. But our Physician is the only true God, the unbegotten and unapproachable, the Lord of all, the Father and Creator of the only-begotten Son. We also have as a Physician the Lord our God, Jesus the Christ, the only-begotten Son and Word, before time began, but who later became man through Mary the virgin. For “the Word was made flesh.” Being incorporeal, He was in the body; being impassible, He was in a passible body; being immortal, He was in a mortal body; being life, He became subject to corruption, so that He might free our souls from death and corruption, heal them, and restore them to health when they were diseased with ungodliness and wicked lusts.