The Great O Antiphon for December 20 is O Clavis. The text of which reads,

O Key of David and sceptre of the House of Israel; you open and no one can shut; you shut and no one can open: Come and lead the prisoners from the prison house, those who dwell in darkness and the shadow of death.

The scriptural allusions in the prayer can be found in the following passages:

Isaiah. 22:22:” I will place on his shoulder the key to the house of David; what he opens no one can shut, and what he shuts no one can open.”
Isaiah 9:2 “The people walking in darkness have seen a great light; on those living in the land of the shadow of death a light has dawned.”
Revelation 3:7   “And to the angel of the church in Philadelphia write: ‘The words of the holy one, the true one, who has the key of David, who opens and no one will shut, who shuts and no one opens.”

O Key of David, set my bound will free;
Unlock the door, that I may walk your way—
Cheerful, resolved, with bright alacrity
To step from the shadows into the day.

Rise! Ride your chariot, your courses run,
Rain down truth, pierce with your arrows of light;
Shine bright O Clavis, as the noonday sun!
Deliver me from death, dis-spell the night.

For resentment has rusted my hard heart–
The spring is broken, will not free the latch;
Use your key to loose, use your locksmith’s art
To turn the bolt, spring the pins, free the catch.

I behold a door hung, see his pierced side,
And the Key turns my heart, enters, abides.

© Randy Edwards 2018
This sonnet is for Christ’s church. If it is helpful, please feel free to copy or reprint in church bulletins, read aloud, or repost. I only ask that an attribution be cited to myself (Randall Edwards) and this blog (backwardmutters.com). Thanks.
artwork: from The Queen Mary Apocalypse, England (London or East Anglia), 1st quarter of the 14th century, Royal 19 B. xv, f. 38v