This section contains material unique in Luke. The only repeated statement occurs in Luke 2:39 and Matthew 2:23. Other unique features are Luke's alternating the reader's attention between John and Jesus, and the joy that several individuals expressed (1:46-55, 68-79; 2:14, 29-32).27
This section has a decidedly Semitic style that suits the connections that it has with the Old Testament. Matthew used fulfillment formulas to show that Jesus was the promised Messiah. Luke was less direct. He showed that Old Testament predictions lay behind these events by describing them in the style and vocabulary of the Old Testament. He also featured Jerusalem and the temple, which provide added connections to the Old Testament.
The alternation between John and Jesus compares and contrasts them (cf. 1 Sam. 1-3).28Luke presented them both as prophets in the Old Testament mold, but Jesus was infinitely superior to John. Note the uses of the title "Most High"(1:32, 35, 76).29First, Luke recorded the announcements of John's and then Jesus' birth (1:5-38). This is a section of comparison primarily. Then he told of Elizabeth blessing Mary and Mary blessing God, a section of predominant contrast (1:39-56). Finally we have the births of John and Jesus, a section of both comparison and contrast (1:57-2:52).
Luke recorded the appearance of angels in this section. Apparently he did so to strengthen the point that Jesus was God's provision for humankind's need. Angels bridge the gap between God and man, and here they rejoiced in God's provision of a Savior for mankind. Frequent references to the Holy Spirit validating and empowering Jesus' ministry increase this emphasis (1:15, 35, 41, 67, 80; 2:25-27).
The theme of joy is present explicitly in the songs and words of praise and thanksgiving as well as implicitly in the mood of the whole section. Still there is a warning of coming pain as well as deliverance (2:35).
Note the similarity of structure that facilitates comparison of John and Jesus.
This section (1:5-56) deals with promise while the rest of the birth and childhood narrative concerns fulfillment (1:57-2:52).