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Dec 20, 2018

‘O Key of David!’ – Fourth Day the O Antiphon Series

Thomas Smith

In this post, Thomas Smith reflects upon the O Antiphon “O Key of David” from the December 20 daily Mass. You can find his other reflections on the O Anthiphons leading up to Christmas here.


(This can also be sung to the melody “O Come, O Come, Emmanuel”)

O come, O come, thou Key of David come,
And open wide our heavenly home,
Make safe the way that leads on high,
and close the path to misery.

Rejoice, Rejoice! Emmanuel
shall come to thee, O Israel


In Isaiah 22, we discover one of the tasks of the prime minister of the Davidic Kingdom (called the al bayit in Hebrew) is to “carry the keys,” symbols of authority over the house of David. This sacred stewardship allowed the vicar of Judah’s king to open what others had shut and to close what had been opened. Centuries later, Jesus will have a fascinating conversation with his chief apostle, Peter, and entrust to him the keys of the renewed kingdom of David (Matthew 16:16-19), giving him the power to bind (close) and loose (open). Since Christ’s kingdom is eternal, these decisions made by Peter on earth are also recognized and ratified in heaven (Matthew 16:19).

As the gospel is preached by Peter and the first apostles, they carry forth the work of the Messiah, “to proclaim liberty to the captives, and the opening of the prison to those who are bound” (Isaiah 61:1). What binds and blinds the human family is not a cement cell but our sins. And the apostles not only announced our liberation but were given the “keys” from the Key of David himself, to effect that forgiveness we need.

In John, the Resurrected Jesus breaths on them and says:

“If you forgive the sins of any, they are forgiven; if you retain the sins of any, they are retained” (John 20:23).

Every step Mary took to Bethlehem was one step closer to giving the world the Key of David which would set us free. That gift and power to forgive sin was entrusted to the successors of the apostles (the bishops) and by extension to the priests who serve the kingdom of Christ with them. Although Christ left the Church the sacramental means of our forgiveness (in baptism and reconciliation), we must walk through those gates of grace. The penitential tone of Advent reminds us of that gift and invites us to receive it anew.


Participate in one of the Advent penance services in your parish or diocese or plan a time to make the sacrament of reconciliation an integral part of your Advent devotions. When you welcome the Christ Child, do it with clean hands and a pure heart.


Let us rest in our Key of David today. He is not only our Key to freedom and deliverance from sin’s enslaving powers, he is the Door of our salvation (John 10:9). Receive his forgiveness. As Pope Francis loves to say, “We will tire of asking the Lord for forgiveness before he will ever tire of giving it to us.”


Tomorrow, December 21, we will reflect on the next O Antiphon, O Light (or O Dawn, or O Dayspring). Make sure you return to the Ascension Blog tomorrow if you want to read the reflection on the proper day.

The reflection for the previous title in the O Antiphon Series, O Root of Jesse, can be found here.

This post was first published on The Great Adventure Blog on December 20, 2013 and modified on December 14, 2018.

You May Also Like:

The O Antiphons Explained: A Daily Series Leading to Christmas

‘O Root of Jesse!’ – Third Day of the O Antiphon Series

Rejoice: Advent Meditations with Mary

About Thomas Smith

Thomas Smith

Thomas Smith is the co-author of Wisdom: God’s Vision for Life,  Revelation: The Kingdom Yet to Come and The Prophets: Messengers of God’s Mercy. He is an international presenter for The Great Adventure Bible Timeline. Bringing a wealth of experience and insight on the Word of God to audiences across the U.S., Thomas is a repeat guest on EWTN and Catholic radio as well as a sought after parish mission and conference speaker. Thomas Smith has taught as an adjunct professor at the St. Francis School of Theology in Denver, and is the former Director of the Denver Catholic Biblical School and the Denver Catechetical School. He lives on his family ranch in southeastern Idaho and writes for his website

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  • Keys are very important in our daily lives. There are keys to our home, keys to our transportation, keys to stored belongings, etc. The keys that God Almighty spoke to Isaiah about were not physical keys. They were keys that opened the spiritual door for us and perhaps entertained a stairway that every human needed to walk up in order to be with Our Almighty Father.
    This Christmas there is so much to ponder with all I have learned from this bible study. One thing is for certain, I have an incredible need for reconciliation. My soul is in need of repair and through the priest, I will be forgiven and loved by Our Savior.

    • Thank you…these words spoke to my heart…God bless you…your pen name says it all…pn= pin ky=key B4=before brain=knowledge; in other words but your heart before what is in your heard. From the very wise words of a very dear friend of mine…LOL 🙂

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