The Ascension of Isaiah is a composite work of great interest. In its present form it is probably not older than the latter half of the 2nd century of our era. The Ascension of Isaiah is made up of three partsÑthe Martyrdom of Isaiah, the Testament of Hezekiah and the Vision of IsaiahÑand these circulated independently as early as the 1st century. The first of these was of Jewish origin; the other two were the work of Christian writers. The Vision of Isaiah is important for the knowledge it preserved of 1st-century beliefs in certain circles as to the doctrines of the Trinity, the Incarnation, the Resurrection, the Seven Heavens, &c.