The Benedictus or Canticle of Zechariah is another great canticle from the Gospel according to St Luke. Here though I have only posted the first few lines.
Blessed be the Lord,
The God of Israel;
He has come to His people and set them free.
He has raised up for us a mighty Saviour,
Born of the house of His servant David.
"He has come to His people and set them free."- Christ came to free us. He had such love and desire for us that He allowed Himself to take the form of a slave and suffered until death, death on a cross.
"He has raised up for us a mighty Savior"- God had sent many men such as Moses and Samson to free His Chosen People from oppression and slavery. Of course these men could never save the Israelites from themselves and the freedom and/or vengeance they wrought was only temporary. This time He came personally and saved us permanently and not just from our physical torments, but also from ourselves and our spiritual bondage.
"Born of the house of His servant David."- God is not only King in His heavenly glory, but also the "Son of David" and as such a King in His humanity as the descendant of an Earthly king. During Samuel's time as Judge of Israel, the Israelites rejected God as their King, but now He has restored Himself as King of His People.