Besides his purely textual works, many of which are listed below, John of Damascus also composed hymns, perfecting the
canon, a structured hymn form used in
Byzantine Rite liturgies.
Early works •
Three Apologetic Treatises against those Decrying the Holy Images – These treatises were among his earliest expositions in response to the edict by the Byzantine Emperor
Leo III, banning the veneration or exhibition of holy images.
Teachings and dogmatic works •
The Fountain of Knowledge, also known by other titles such as:
The Fountain of Wisdom or
The Fount of Knowledge (
Koinē Greek: Πηγή Γνώσεως, Pēgē gnōseōs, literally meaning "The Source of Knowledge"), is described as a synthesis and unification of Christian philosophy, ideas and doctrine that was influential in directing the course of medieval Latin thought and that became the principal textbook of Greek Orthodox theology. Divided into three parts the chapters are: •
Philosophical Chapters (Koinē Greek: Κεφάλαια φιλοσοφικά
, Kefálea filosofiká) – commonly called "Dialectic", it deals mostly with logic, its primary purpose being to prepare the reader for a better understanding of the rest of the book. Based on the previous work of the late-3rd-century Neoplatonist
Porphyry’s
Isagoge, an introduction to the logic of Aristotle. The work was notable in that it allowed John of Damascus with information to explain the basic concepts of logic and the rationalisation of God. •
Concerning Heresy (Koinē Greek: Περὶ αἱρέσεων,
Perì eréseon, literally meaning "About Heresies") – Based on the previous work of the
Panarion (Koinē Greek: Πανάριον, derived from
Latin panarium, meaning "bread basket") by
Epiphanius of Salamis. was 4th-century heresiology that provided John with a structural model and descriptions of 80 earlier heresies. However, this remains uncertain, as modern scholarship, including the 1958 introduction to John’s translated works, finds no concrete evidence to substantiate these influences, stating that "there is apparently no foundation for it."Thus, while the idea of such contributions persists, it lacks definitive support and remains speculative. Unlike earlier sections devoted to other heresies, which are disposed of succinctly in just a few lines, this chapter runs into several pages. It constitutes one of the first
Christian refutations of Islam. In treating of
Heresy of the Ishmaelites he vigorously assails the immoral practices of
Muhammad and the corrupt teachings inserted in the
Quran to legalize the delinquencies of the prophet. •
An Exact Exposition of the Orthodox Faith (Koinē Greek: Ἔκδοσις Ἀκριβὴς τῆς Ὀρθοδόξου Πίστεως
, Ékdosis akribès tēs Orthodóxou Písteōs) – a summary of the teachings and dogmatic writings of the
early Church Fathers and more specifically the
Cappadocian Fathers (
Saint Basil,
Saint Gregory of Nazianzus and
Saint Gregory of Nyssa) from the 4th century. It incorporates
Aristotelian language and demonstrates originality through John's selection of texts and annotations influenced by
Antiochene analytical theology. This work, when translated into Oriental languages and Latin, became a valuable resource for both Eastern and Western thinkers, offering logical and theological concepts. Additionally, its systematic style served as a model for subsequent theological syntheses composed by medieval Scholastics. The "Exposition" delves into speculations about the nature and existence of God, giving rise to points of debate among later theologians. This writing was the first work of
systematic theology in
Eastern Christianity and an important influence on later Scholastic works. Regardless, John claims that he asked the Muslims what witnesses can testify that Muhammad received the Quran from God – since, John says, Moses received the Torah from God in the presence of the Israelites, and since Islamic law mandates that a Muslim can only marry and do trade in the presence of witnesses – and what biblical prophets and verses foretold Muhammad's coming – since, John says, Jesus was foretold by the prophets and whole Old Testament. John claims that the Muslims answered that Muhammad received the Quran in his sleep. John replied "Then we jokingly say to them that, as long as he received the book in his sleep and did not actually sense the operation" claims that he jokingly answered, "You're spinning me dreams." Some of the Muslims, John says, claimed that the Old Testament that Christians believe foretells Jesus' coming is misinterpreted, while other Muslims claimed that the Jews edited the Old Testament so as to deceive Christians (possibly into believing Jesus is God, but John does not say). While recounting his dialogue with Muslims, John claims that they have accused him of idol worship for venerating the Cross and worshipping Jesus. John claims that he told the Muslims that the black stone in Mecca was the head of a statue of
Aphrodite. Moreover, he claims, the Muslims would be better off to associate Jesus with God if they say Jesus is the
Word of God and Spirit. John claims that the word and the spirit are inseparable from that in which they exist and if the Word of God has always existed in God, then the Word must be God. John ends the chapter by claiming that Islam permits
polygamy, that Muhammad committed adultery with a companion's wife before outlawing adultery, and that the Quran is filled with stories, such as the
She-Camel of God and God giving Jesus an "incorruptible table."
Other works •
Against the Jacobites •
Against the Nestorians •
Dialogue against the Manichees •
Elementary Introduction into Dogmas •
Letter on the Thrice-Holy Hymn •
On Right Thinking •
On the Faith, Against the Nestorians •
On the Two Wills in Christ (Against the Monothelites) •
Sacred Parallels (dubious) •
Octoechos (the church's liturgical book of eight tones) •
On Dragons and Ghosts ==Arabic translation==