Messiah (HWV 56), the English-language oratorio composed by George Frideric Handel in 1741, is structured in three parts. The wordbook (also called libretto or text) was supplied by Charles Jennens. This article covers Part I and describes the relation of the musical setting to the text. Part I begins with the prophecy of the Messiah and his virgin birth by several prophets, namely Isaiah. His birth is still rendered in words by Isaiah, followed by the annunciation to the shepherds as the only scene from a Gospel in the oratorio, and reflections on the Messiah's deeds. Part II covers the Passion, death, resurrection, ascension, and the later spreading of the Gospel. Part III concentrates on Paul's teaching of the resurrection of the dead and Christ's glorification in heaven.