Attributed to John are treatises on the
soul (in eight chapters),
Paradise,
Creation, the
economy of salvation, the
resurrection of Jesus,
Pentecost, the discovery of the
True Cross,
demons, and
Christian doctrine in general. He also wrote a treatise against
heretics, an
anaphora and a commentary on the
Pseudo-Dionysian works
On the Celestial Hierarchy and
On the Ecclesiastical Hierarchy. A treatise on the
priesthood (in four chapters) is attributed to him in some manuscripts but to
John Maron in others, and by some to
Mushe bar Kipho. None of these have been published beyond a few quotations. His only published works are a treatise on the
eucharist in four chapters, known by its
Latin title
De oblatione or as the
Commentary on the Liturgy, and his four commentaries on the
resurrection of the body. In
De oblatione, John uses the phrase "putting on the body" to describe the
Incarnation. This phrase, common in the Syriac of the
dyophysite Church of the East, had become rare among the
monophysite Syriac Orthodox in John's time. He compares the putting on the body of the
Word (Jesus) with the priest's putting on the
vestments. John's treatise on the soul, known from two manuscripts and still unpublished, has been studied in some detail. It incorporates an entire treatise on the same subject by
John of Atarib. He also quotes from the
pseudo-Platonic treatise ''On the Subsistence of Soul's Virtues'', which was written originally in
Greek but survives only in
Arabic. John's Syriac quotations seem to show that a full Syriac translation was made and that the Arabic translation was made from it. In his treatise on the soul, John proposed a novel classification of vices, which he may have taken from the Greek work: every vice is opposed to a virtue and to another vice. Although this would mean that there are twice as many vices as virtues, each virtue represents the balance of its opposing vices. According to
Bar Hebraeus'
Hudoye (
nomocanon), written in the 13th century, the writings of John were required reading the monasteries.
Jacob bar Ṣalibi cites his commentary on either the whole
New Testament or just the
Gospels, but this work appears to be lost. ==Notes==