His father Zechariah was filled 
with the Holy Spirit and prophesied:
"Praise be to the Lord, the God of Israel,
because he has come and
has redeemed his people.
He has raised up a horn of salvation for us
in the house of his servant David
(as he said through his holy prophets of long ago),
salvation from our enemies
and from the hand of all who hate us—
to show mercy to our fathers
and to remember his holy covenant,
the oath he swore to our father Abraham:
to rescue us from the hand of our enemies,
and to enable us to serve him without fear
in holiness and righteousness
before him all our days.
And you, my child,
will be called a prophet of the Most High;
for you will go on before the Lord
to prepare the way for him,
to give his people the knowledge of salvation
through the forgiveness of their sins,
because of the tender mercy of our God,
by which the rising sun
will come to us from heaven
to shine on those living in darkness
and in the shadow of death,
to guide our feet into the path of peace."
Zechariah was a righteous Levite that had experienced a firm angel and God's discipline. After God unloosed his tongue, month's of stored-up praise came spilling forth.
As a man who aspired to serve the Lord, this brings a real appreciation to his words in verses 74b-75. Living in a homeland held captive by a pagan king, how deeply he must have desired to serve God without fear.
In his exile from speech he had time to listen. Listen to the word of God. I'm sure, being raised to serve in the temple, he stored up God's word within his heart and meditated often on the verses of promise. In his silence, how often did he replay the words of the angel? Words he would recognize as being vaguely familiar from his teachings? How often did he remember the Psalms of Ascent he would sing as he climbed the holy mount to serve at the Lord's temple. Storing up God's word in his heart enabled him to recognize God's hand and acknowledge Him in praise. Would he recall the words of praise now recorded in
Psalm 89:2:
I will declare that your love stands firm forever,
that you established your faithfulness in heaven itself.
He was praising God for the long-awaited deliverance of God's people. He was relating to the Abrahamic Covenant, not realizing fully the new-coming Covenant of Grace. A covenant that would provide release not only from political captivity and oppression but freedom from keeping the law and a peace with God that the entire world would realize.
By the filling of the Holy Spirit he recognized that his son was the answer to the promised prophet and the forerunner to the Christ. Following praise, he then prophesied the role of his son and the coming of their Savior.
Sitting in his silence, did he ponder Mary's child? Did they make the feasible connection? I can hardly imagine some of their prayers! Did they dare dream of the possible fulfillment of generations of hope?
God had given to Zechariah a precious gift. A gift to propecy that the time had indeed come. His service of worship in the temple had received ultimate blessing from God - use in His kingdom plan.
Merciful God; praise be that You have redeemed your people and have established a Covenant of Grace; that Your Son has come from heaven to shine a light on us in grace and truth. Thank You, Jesus, that You are the Way; our Righteousness, our Path of Peace to God and our Salvation. Amen.
"John testifies concerning him [Jesus]......'From the fullness of his grace we have all received one blessing after another. For the law was given through Moses; grace and truth came through Jesus Christ.'"
[Jn 1:15a-17 adapted]