The Zeal of the Lord of Hosts will Do This

Encore Post: When I was at seminary, I fell in love with the book of Isaiah. My love for the book has only intensified. This is especially so when it comes to the readings that we just heard from Isaiah for Christmas. Isaiah 9:2-7 is perhaps the most well known prophecy of the coming Messiah. We easily remember the names that Isaiah calls the child who is to be born: “Wonderful Counselor, Mighty God, Everlasting Father, Prince of Peace.” But we should not forget the the last sentence of verse 7. It says, “The zeal of the Lord of Hosts will do this.”

That got me thinking more about the Lord’s zeal. What is it? What does it mean that the Lord has zeal? And in which direction is this zeal going?

Yes, what is this zeal? As I studied the word behind the translation “zeal”, the word used is the same word that the Lord uses to describe himself as a jealous God to Israel at Mt. Sinai. There He speaks to Israel displaying to them that they are his possession and no one else’s, and Israel should not chase after false gods because they are the Lord’s chosen. The Lord knows his own, so he desires them for himself and for himself alone.

But in Isaiah, as I traced the word further, I saw that zeal was also connected to the Lord’s promise he made to David. That promise is found in 2 Samuel 7, when the Lord tells David that he will place a son on the throne and he his reign will be forever and it will be a reign of peace.

That is big news! And the first instance of this word in Isaiah as well as Isaiah 37:32-35, “zeal” connects us back to that promise made to David. The child that is born, the son that is given will reign on the throne of David. And it will be so because the zeal of the Lord of Hosts will do this. The Lord remembers his promises and makes them come full circle in the birth of Jesus. He is the King of the Jews, the Son of David, who saves his people and brings peace to all, as the angels declare.

The Lord’s zeal is for his people, whom He works to reconcile unto Himself. And this zeal is seen again in the work that this Son of Isaiah 9 does. He joyfully goes to the cross to bring to us peace! The Lord’s zeal is Jesus’ zeal who cares for us, remembers us, and dies for us that we might be made children of God.

What a zealous God we have, caring for his people, remembering his promises, and by his own zeal makes his promises come true! The zeal of the Lord of hosts has done it and done well for us and our salvation!

Merry Christmas!

Rev. Jacob Hercamp
Christ Lutheran Church
Noblesville, Indiana