"Mohammedanism was a heresy: that is the essential point to grasp before going any further. It began as a heresy, not as a new religion. It was not a pagan contrast with the Church; it was not an alien enemy. It was a perversion of Christian doctrine. Its vitality and endurance soon gave it the appearance of a new religion, but those who were contemporary with its rise saw it for what it was-not a denial, but an adaptation and a misuse, of the Christian thing. It differed from most (not from all) heresies in this, that it did not arise within the bounds of the Christian Church. The chief heresiarch, Mohammed himself, was not, like most heresiarchs, a man of Catholic birth and doctrine to begin with. He sprang from pagans. But that which he taught was in the main Catholic doctrine, oversimplified. It was the great Catholic world-on the frontiers of which he lived, whose influence was all around him and whose territories he had known by travel-which inspired his convictions. He came of, and mixed with, the degraded idolaters of the Arabian wilderness, the conquest of which had never seemed worth the Romans' while.
He took over very few of those old pagan ideas which might have been native to him from his descent. On the contrary, he preached and insisted upon a whole group of ideas which were peculiar to the Catholic Church and distinguished it from the paganism which it had conquered in the Greek and Roman civilization. Thus the very foundation of his teaching was that prime Catholic doctrine, the unity and omnipotence of God. The attributes of God he also took over in the main from Catholic doctrine: the personal nature, the all-goodness, the timelessness, the providence of God, His creative power as the origin of all things, and His sustenance of all things by His power alone. The world of good spirits and angels and of evil spirits in rebellion against God was a part of the teaching, with a chief evil spirit, such as Christendom had recognized. Mohammed preached with insistence that prime Catholic doctrine, on the human side-the immortality of the soul and its responsibility for actions in this life, coupled with the consequent doctrine of punishment and reward after death." ...
Now, why did this new, simple, energetic heresy have its sudden overwhelming success? One answer is that it won battles. It won them at once, as we shall see when we come to the history of the thing. But winning battles could not have made Islam permanent or even strong had there not been a state of affairs awaiting some such message and ready to accept it."
St Peter's List September 23, 2013:
In his work The Fount of Knowledge, St. John Damascene (c. 675 or 676 – 4 December 749) gifts the Church with one of the earliest summa theologicas. He is considered the last of the great Early Church Fathers and it would be difficult to exaggerate his influence on the Christian East. He is also esteemed in the Western Church as a forerunner to the scholastics and is considered by some as the first scholastic. St. John Damascene is best known for his fight against iconoclasm.1
The Fount of Knowledge is divided into three categories:
In his passage on Concerning Heresies, his section on the superstition of the Ishmaelites is considerably longer than most. One reason for this attention could be his prolonged battles against iconoclasm, in which the influence of Islam was a significant factor. The following are selected sections from his passage on Islam.
- “Philosophical Chapters” (Kephalaia philosophika) – “With the exception of the fifteen chapters that deal exclusively with logic, it has mostly to do with the ontology of Aristotle. It is largely a summary of the Categories of Aristotle with Porphyry’s “Isagoge” (Eisagoge eis tas kategorias). It seems to have been John Damascene’s purpose to give his readers only such philosophical knowledge as was necessary for understanding the subsequent parts of the “Fountain of Wisdom”.
- “Concerning Heresy” (Peri aipeseon) – “Little more than a copy of a similar work by Epiphanius, brought up to date by John Damascene. The author indeed expressly disclaims originality except in the chapters devoted to Islamism, Iconoclasm, and Aposchitae. To the list of eighty heresies that constitute the “Panarion” of Epiphanius, he added twenty heresies that had sprung up since his time. In treating of Islamism he vigorously assails the immoral practices of Mohammed and the corrupt teachings inserted in the Koran to legalize the delinquencies of the prophet.”
- “An Exact Exposition of the Orthodox Faith” (Ikdosis akribes tes orthodoxou pisteos) – “The third book of the “Fountain of Wisdom”, is the most important of John Damascene’s writings and one of the most notable works of Christian antiquity. Its authority has always been great among the theologians of the East and West. Here, again, the author modestly disavows any claim of originality — any purpose to essay a new exposition of doctrinal truth. He assigns himself the less pretentious task of collecting in a single work the opinions of the ancient writers scattered through many volumes, and of systematizing and connecting them in a logical whole.2
1. Muhammed devised his own heresy
“There is also the superstition of the Ishmaelites which to this day prevails and keeps people in error, being a forerunner of the Antichrist. They are descended from Ishmael, [who] was born to Abraham of Agar, and for this reason they are called both Agarenes and Ishmaelites… From that time to the present a false prophet named Mohammed has appeared in their midst. This man, after having chanced upon the Old and New Testaments and likewise, it seems, having conversed with an Arian monk, devised his own heresy. Then, having insinuated himself into the good graces of the people by a show of seeming piety, he gave out that a certain book had been sent down to him from heaven. He had set down some ridiculous compositions in this book of his and he gave it to them as an object of veneration.”
2. Christ’s shadow was crucified
“He says that there is one God, creator of all things, who has neither been begotten nor has begotten. He says that the Christ is the Word of God and His Spirit, but a creature and a servant, and that He was begotten, without seed, of Mary the sister of Moses and Aaron. For, he says, the Word and God and the Spirit entered into Mary and she brought forth Jesus, who was a prophet and servant of God. And he says that the Jews wanted to crucify Him in violation of the law, and that they seized His shadow and crucified this. But the Christ Himself was not crucified, he says, nor did He die, for God out of His love for Him took Him to Himself into heaven.”
3. Christ denied saying, “I am the Son of God and God.”
“And he says this, that when the Christ had ascended into heaven God asked Him: ‘O Jesus, didst thou say: “I am the Son of God and God”?’ And Jesus, he says, answered: ‘Be merciful to me, Lord. Thou knowest that I did not say this and that I did not scorn to be thy servant. But sinful men have written that I made this statement, and they have lied about me and have fallen into error.’ And God answered and said to Him: ‘I know that thou didst not say this word.” There are many other extraordinary and quite ridiculous things in this book which he boasts was sent down to him from God.”
4. Where did Scripture foretell Muhammad?
“But when we ask: ‘And who is there to testify that God gave him the book? And which of the prophets foretold that such a prophet would rise up?’—they are at a loss. And we remark that Moses received the Law on Mount Sinai, with God appearing in the sight of all the people in cloud, and fire, and darkness, and storm. And we say that all the Prophets from Moses on down foretold the coming of Christ and how Christ God (and incarnate Son of God) was to come and to be crucified and die and rise again, and how He was to be the judge of the living and dead. Then, when we say: ‘How is it that this prophet of yours did not come in the same way, with others bearing witness to him? And how is it that God did not in your presence present this man with the book to which you refer, even as He gave the Law to Moses, with the people looking on and the mountain smoking, so that you, too, might have certainty?’—they answer that God does as He pleases.”
5. Where are the witnesses?
“When we ask again: ‘How is it that when he enjoined us in this book of yours not to do anything or receive anything without witnesses, you did not ask him: “First do you show us by witnesses that you are a prophet and that you have come from God, and show us just what Scriptures there are that testify about you”’—they are ashamed and remain silent.”
6. What do the Muslims call Christians?
“Moreover, they call us Hetaeriasts, or Associators, because, they say, we introduce an associate with God by declaring Christ to the Son of God and God… And again we say to them: ‘As long as you say that Christ is the Word of God and Spirit, why do you accuse us of being Hetaeriasts? For the word, and the spirit, is inseparable from that in which it naturally has existence. Therefore, if the Word of God is in God, then it is obvious that He is God. If, however, He is outside of God, then, according to you, God is without word and without spirit. Consequently, by avoiding the introduction of an associate with God you have mutilated Him. It would be far better for you to say that He has an associate than to mutilate Him, as if you were dealing with a stone or a piece of wood or some other inanimate object. Thus, you speak untruly when you call us Hetaeriasts; we retort by calling you Mutilators of God.’”
7. On Women
“As has been related, this Mohammed wrote many ridiculous books, to each one of which he set a title. For example, there is the book On Woman, in which he plainly makes legal provision for taking four wives and, if it be possible, a thousand concubines—as many as one can maintain, besides the four wives. He also made it legal to put away whichever wife one might wish, and, should one so wish, to take to oneself another in the same way. Mohammed had a friend named Zeid. This man had a beautiful wife with whom Mohammed fell in love. Once, when they were sitting together, Mohammed said: ‘Oh, by the way, God has commanded me to take your wife.’ The other answered: ‘You are an apostle. Do as God has told you and take my wife.’
As shown by the artwork above, the Middle Ages also viewed Islam has a heresy. In Dante’s Inferno, Canto XXVIII, Muhammad is depicted as “twixt the legs, Dangling his entrails hung, the midriff lay Open to view…” Muhammad suffers the punishment of the schismatics: having his body rent from chin to anus for how he rent the Body of Christ. The great Catholic thinker Hilarie Belloc (1870-1953) is also known for his treatise on Islam as The Great and Enduring Heresy of Mohammed.
- Fount of Knowledge: A digital download of Catholic University of America’s translation is available (here) and an except may be viewed online (here). Furthermore, a larger excerpt on Islam from Fount of Knowledge may be read on an Orthodox website (here). Another translation is available in its entirety online, but SPL is unfamiliar with the translation (here).
- St. John Damascene Information: Biographical information and the structure of the Fountain of Wisdom is adapted from the Catholic Encyclopedia article.