Luke 1:67-79 records Zechariah’s praise to God after months of silence. Zechariah’s praise is often called the Benedictus, and this is the second praise hymn of the birth narrative (the first hymn is Mary’s song found at Luke 1:46–55). In this praise hymn, Zechariah celebrates God coming and visiting His people through the birth of the Savior, Jesus Christ! In the Benedictus, Zechariah prophesied that the coming Savior would redeem His people and his son, John, would prepare the Savior’s way. Zechariah was the father of John the Baptist and John had been chosen to pave the way for the Savior. Moreover, Zechariah gave praise to God because God had kept all His promises announced through the Old Testament prophets of a coming Savior.
In as early as Genesis, God promised Abraham to bless all peoples through him, “All peoples on earth will be blessed through you.” (Genesis 12:1–3; Zechariah 2:11–12). As the father of the nation of Israel, God promised Abraham that his descendants would bless the whole world. Jesus Christ, a descendent of Abraham, fulfilled this promise completely (Luke 1:72–73). Thus, people from all nations are blessed through faith in Abraham’s descendent, Jesus Christ, also called the “seed of Abraham.” Moreover, Jesus Christ is the Horn of Salvation from the royal line of King David (Luke 1:32-33; Luke 1:69). God promised King David an eternal Kingdom (2 Samuel 7:11-16; see also Isaiah 9:6-7; Isaiah 11:1-5; Jeremiah 23:5-6).
Christmas celebrates God visiting His people through the birth of His Son, Jesus Christ at Bethlehem. God previously visited His people to redeem them from the oppressive Egyptian slavery with the Exodus (Exodus 3; Exodus 12). Now, Zechariah is celebrating God visiting His people again to deliver every one of their sin and evil through faith in His Son, Jesus Christ. This is why Christmas is so special because God has come and visited His people! God, through Jesus Christ, visited His people to bring a new redemption, deliverance, and a new covenant to save all people from their sin (Jeremiah 31:31–34). Now you can understand Zechariah’s excitement and praise!