Besides this, he mutilates the Gospel which is according to Luke, removing all that is written respecting the generation of the Lord, and setting aside a great deal of the teaching of the Lord, in which the Lord is recorded as most dearly confessing that the Maker of this universe is His Father. He likewise persuaded his disciples that he himself was more worthy of credit than are those apostles who have handed down the Gospel to us, furnishing them not with the Gospel, but merely a fragment of it. In like manner, too, he dismembered the Epistles of Paul, removing all that is said by the apostle respecting that God who made the world, to the effect that He is the Father of our Lord Jesus Christ, and also those passages from the prophetical writings which the apostle quotes, in order to teach us that they announced beforehand the coming of the Lord. [Irenaeus Adv Haer 1.27.2]
But Marcion, mutilating that according to Luke, is proved to be a blasphemer of the only existing God, from those [passages] which he still retains. [Irenaeus Adv Haer 3.11.7]
Wherefore also Marcion and his followers have betaken themselves to mutilating the Scriptures, not acknowledging some books at all; and, curtailing the Gospel according to Luke and the Epistles of Paul, they assert that these are alone authentic, which they have themselves thus shortened. In another work, however, I shall, God granting [me strength], refute them out of these which they still retain. [ibid 3.12.12]
There are also many other particulars to be found mentioned by Luke alone, which are made use of by both Marcion and Valentinus. And besides all these, [he records] what [Christ] said to His disciples in the way, after the resurrection, and how they recognised Him in the breaking of bread. It follows then, as of course, that these men must either receive the rest of his narrative, or else reject these parts also. For no persons of common sense can permit them to receive some things recounted by Luke as being true, and to set others aside, as if he had not known the truth. And if indeed Marcion's followers reject these, they will then possess no Gospel; for, curtailing that according to Luke, as I have said already, they boast in having the Gospel [in what remains].[ibid 3.14.3,4]
Marcion seems to have singled out Luke for his mutilating process. Luke, however, was not an apostle, but only an apostolic, not a master but a disciple (Nam ex iis commentatoribus quos habemus Lucam videtur Marcion elegisse quem caederet. Porro Lucas non apostolus sed apostolicus, non magister sed discipulus)[Tertullian AM 4.2]
In the scheme of Marcion, on the contrary, the mystery of the Christian religion begins from the discipleship of Luke. Since, however, it was on its course previous to that point, it must have had its own authentic materials, by means of which it found its own way down to St. Luke; and by the assistance of the testimony which it bore, Luke himself becomes admissible. Well, but Marcion, finding the Epistle of Paul to the Galatians (wherein he rebukes even apostles) for "not walking uprightly according to the truth of the gospel," as well as accuses certain false apostles of perverting the gospel of Christ), labours very hard to destroy the character of those Gospels which are published as genuine and under the name of apostles, in order, forsooth, to secure for his own Gospel the credit which he takes away from them. [ibid 4.3]
How, then, does that agree with ours, which is said not to be (the work) of apostles, but of Luke? Or else, again, if that which Marcion uses is not to be attributed to Luke simply because it does agree with ours (which, of course, is, also adulterated in its title), then it is the work of apostles. Our Gospel, therefore, which is in agreement with it, is equally the work of apostles, but also adulterated in its title. [ibid]
With regard, then, to the pending question, of Luke's Gospel (so far as its being the common property of ourselves and Marcion enables it to be decisive of the truth,) that portion of it which we alone receive is so much older than Marcion, that Marcion, himself once believed it, when in the first warmth of faith he contributed money to the Catholic church, which along with himself was afterwards rejected, when he fell away from our truth into his own heresy. What if the Marcionites have denied that he held the primitive faith amongst ourselves, in the face even of his own letter? What, if they do not acknowledge the letter? They, at any rate, receive his Antitheses; and more than that, they make ostentatious use of them. Proof out of these is enough for me. For if the Gospel, said to be Luke's which is current amongst us (we shall see whether it be also current with Marcion), is the very one which, as Marcion argues in his Antitheses, was interpolated by the defenders of Judaism, for the purpose of such a conglomeration with it of the law and the prophets as should enable them out of it to fashion their Christ, surely he could not have so argued about it, unless he had found it (in such a form). No one censures things before they exist, when he knows not whether they will come to pass. Emendation never precedes the fault. To be sure, an amender of that Gospel, which had been all topsy-turvy from the days of Tiberius to those of Antoninus, first presented himself in Marcion alone--so long looked for by Christ, who was all along regretting that he had been in so great a hurry to send out his apostles without the support of Marcion! But for all that, heresy, which is for ever mending the Gospels, and corrupting them in the act, is an affair of man's audacity, not of God's authority [ibid 4.4]
I say, therefore, that in them (and not simply such of them as were rounded by apostles, but in all those which are united with them in the fellowship of the mystery of the gospel of Christ) that Gospel of Luke which we are defending with all our might has stood its ground from its very first publication; whereas Marcion's Gospel is not known to most people, and to none whatever is it known without being at the same time condemned. [ibid 4.5]
For even Luke's form of the Gospel men unsually ascribe to Paul. And it may well seem that the works which disciples publish belong to their masters. Well, then, Marcion ought to be called to a strict account concerning these (other Gospels) also, for having omitted them, and insisted in preference on Luke; as if they, too, had not had free course in the churches, as well as Luke's Gospel, from the beginning. Nay, it is even more credible that they existed from the very beginning; for, being the work of apostles, they were prior, and coeval in origin with the churches themselves. But how comes it to pass, if the apostles published nothing, that their disciples were more forward in such a work; for they could not have been disciples, without any instruction from their masters? [ibid]
For if the (Gospels) of the apostles have come down to us in their integrity, whilst Luke's, which is received amongst us, so far accords with their rule as to be on a par with them in permanency of reception in the churches, it clearly follows that Luke's Gospel also has come down to us in like integrity until the sacrilegious treatment of Marcion. In short, when Marcion laid hands on it, it then became diverse and hostile to the Gospels of the apostles. I will therefore advise his followers, that they either change these Gospels, however late to do so, into a conformity with their own, whereby they may seem to be in agreement with the apostolic writings (for they are daily retouching their work, as daily they are convicted by us); or else that they blush for their master, who stands self-condemned either way--when once he hands on the truth of the gospel conscience smitten, or again subverts it by shameless tampering. [ibid]
Is that it? There must be more.
