The Ascension of Isaiah along with the main 4 gospels is a pseudepigraphical Judeo-Christian text. Scholarly estimates regarding the date of the Ascension of Isaiah range from 70 AD to 175 AD. Many scholars believe it to be a compilation of several texts completed by an unknown Christian scribe who claimed to be the Prophet Isaiah, while an increasing number of scholars in recent years have argued that the work is a unity by a single author that may have utilized multiple sources.
Many scholars have seen some similarities between Gnosticism and the Ascension of Isaiah.
Dating of the text
It is generally believed that the text is composed of three different sections written at different times, by different authors. The earliest section, regarding chapters 3:13–4:22, was composed at about the end of the first century AD or perhaps early second century and is believed to be a text of Jewish origins which was later on redacted by Christian scribes. The date of the Vision of Isaiah (chapters 6–11) is rather more difficult to determine, but it is no more recent than the third century, since Jerome (c. 347–420 AD) cites a fragment of the work in some of his writings, but from internal evidence it seems that the text is to be placed before the end of the second century AD. The whole work was on a later date assembled as M.A. Kinibb writes:
It is not known when exactly the three sections of the Ascension were combined. The Greek fragment (from the 5th–6th cent.), the palimpsest giving the text of the fragments of the first Latin translation (likewise from the 5th–6th cent.), and the Ethiopic translation (which was made some time during the 4th-6th cent.) all presuppose the existence of the complete work. But the character of the mistakes in the Greek fragment and the Latin palimpsest suggests that the complete work had already been in existence for some time when these manuscripts were copied. It thus seems likely that the three sections of the Ascension were brought together in the third or fourth century A.D., and this is confirmed by the fact that Jerome seems to have known the complete book. It is possible that there were two stages in the process, first the combination of 3:13-4:22 with the Martyrdom, and second the combination of the enlarged Martyrdom with the Vision.
Knibb thus dates the whole text as being written between AD 150 and 200 but assembled at a later time. Most scholars agree that a mid to early second century date for the principal portion of the document is probable, dateable in its present to the least the early part of the second century.
Content
Structure
The book has three main sections: The first part of the book (chapters 1–5), generally referred to as the Martyrdom of Isaiah, recounts and expands on the events of 2 Kings chapter 21. Isaiah warns the dying Hezekiah that his heir, Manasseh, will not follow the same path. When Manasseh takes over, and Isaiah's warning proves true, Isaiah and a group of fellow prophets head into the desert, and a demon named Beliar inspires a false prophet named Belkira to accuse Isaiah of treason. The king consequently condemns Isaiah to death, and although Isaiah hides in a tree, he is found, and Belkira leads the execution. Into the middle of this (3:13–4:22) is a Christian apocalypse called the Testament of Hezekiah, describing a vision of the coming of Jesus, the subsequent corruption of the Christian church, the rule of Beliar, and the second coming. All of this is phrased in such a way that it is clearly a code for the persecution of the Church by Nero and the belief that Nero was an Antichrist. The second part of the book (chapters 6–11) is referred to as the Vision of Isaiah and describes an angel-assisted journey, prior to the events of the first part of the book, by Isaiah through the Seven Heavens. It is written from a Christian perspective, concentrating on Jesus (named as the "Beloved" in the text) descending through each of the heavens disguising himself as an angel toward earth, his earthly birth, death, his resurrection, and the ascension of Jesus.
The extant complete manuscripts of the Ascension of Isaiah include a brief account of Jesus' nativity, birth, and crucifixion (11:2–22). According to Jonathan Knight, these expanded traditions are found in the Ethiopic translation (E) while the Slavonic and one of the two Latin translations (S and L2) replace them with a short summary of the earthly appearance traditions. Furthermore, he states that the common outlook among scholars is that 11:2-22 was originally in the Ascension of Isaiah and not a later insertion or adulteration.