The attack on Epiphanius as a plagiarist of Origenis an outrage on the Bishops generally. Origennever wrote 6000 books.
21 To what point will not rashness reach when once the reins which check it are relaxed? After telling us of the excommunication of Hilary, the heretical book falsely bearing the name of Cyprian, the successive erasure and insertion in the work of Athanasius made while I was asleep, he as a last effort breaks forth into an attack upon the pope Epiphanius: the chagrin engendered in his heart because Epiphanius in the letter which he wrote to the bishop John had called him a heretic, he pours out in his apology for Origen, and comforts himself with these words:
“The whole truth, which has been hidden, must here be laid bare. It is impossible that any man should exercise so unrighteous a judgment as to judge unequally where the cases are equal. But the fact is, the prompters of those who defame Origen are men who either make it a habit to discourse in the churches at great length or write books, the whole of which, both books and discourse are taken from Origen. To prevent men therefore from discovering their plagiarism, the crime of which can be concealed so long as they act ungratefully towards their master, they deter all simple persons from reading him. One of them, who considers himself to have a necessity laid upon him to speak evil of Origen through every nation and tongue, as if that were to preach the Gospel, once declared in the audience of a vast multitude of the brethren that he had read six thousand of his books. If he read them, as he is wont to declare, in order to know what harm there was in him, ten or twenty books, or at most thirty, would have been sufficient for that knowledge. To read six thousand books is not like one who wants to know the harm and the errors that are in him, but like one who consecrates almost his whole life to studies conducted under his tuition. How then can he claim to be listened to when he blames those who, for the sake of instruction, have read a small portion of his works, taking care to maintain whole their own system of belief and their piety?”
22. Who are these men who are wont to dispute at such great length in the churches, and to write books, and whose discourses and writings are taken wholly from Origen; these men who are afraid of their literary thefts becoming known, and show ingratitude towards their master, and who therefore deter men of simple mind from reading him? You ought to mention them by name, and designate the men themselves. Are the reverend bishops Anastasius and Theophilus, Venerius and Chromatius, and the whole council of the Catholics both in the East and in the West, who publicly denounce him as a heretic, to be esteemed to be plagiarists of his books? Are we to believe that, when they preach in the churches, they do not preach the mysteries of the Scriptures, but merely repeat what they have stolen from Origen? Is it not enough for you to disparage them all in general, but you must specially aim the spear of your pen against a reverend and eminent Bishop of the church? Who is this who considers that he has a necessity laid on him of reviling Origen, as the Gospel which he must preach among all nations and tongues? This man who proclaimed in the audience of a vast multitude of the brethren that he had read six thousand of his books? You yourself were in the very centre of that multitude and company of the brethren, when, as he complains in his letter, the monstrous doctrines of Origen were enlarged upon by you. Is it to be imputed to him as a crime that he knows the Greek, the Syrian, the Hebrew, the Egyptian, and in part also the Latin language? Then, I suppose, the Apostles and Apostolic men, who spoke with tongues, are to be condemned; and you who know two languages may deride me who know three. But as for the six thousand books which you pretend that he has read, who will believe that you are speaking the truth, or that he was capable of telling such a lie? If indeed Origen had written six thousand books, it is possible that a man of great learning, who had been trained from his infancy in sacred literature might have read books alien from his own convictions, because he had an inquiring spirit and a love of learning. But how could be read what Origen never wrote? Count up the index contained in the third volume of Eusebius, in which is his life of Pamphilus: you will not find, I do not say six thousand, but not a third of that number of books. I have by me the letter of the above named Pontiff, in which he gives his answer to this calumny of yours uttered when you were still in the East; and it confutes this most manifest falsehood with the open countenance of truth.
Source: Apology for himself against the Books of Rufinus (New Advent)