
Now that we have gone through all of the Old and New Testament readings leading up to the birth of Christ, we turn our focus to the O Antiphons. The O Antiphons have been a liturgical tradition since the time of the early Church. There are eight of them (thus the word octave) and so we begin the tradition on the 17th and conclude it on the 23rd right before Christmas Eve. Each antiphon emphasizes a title for the Messiah. At the same time, each title also refers to the prophecy of Isaiah of the coming Messiah.
They are:
O Sapientia - Jesus is Wisdom
O Adonai - Jesus is Lord
O Radix Jesse - Jesus is Flower of Jesse
O Clavis David - Jesus is Key of David
O Oriens - Jesus is the Radiant Dawn
O Rex Gentium - Jesus is King of the Gentiles
O Emmanuel - "God with us" Jesus is Light of the World
According to Professor Robert Greenberg of the San Fancisco Conservatory of Music, these antiphons were arranged by the Benedictine monks in this way for a reason. Looking at the first letter of each title beginning with Emmanuel and going back from the 23rd to the 17th, it spells EROCRAS - forming the Latin phrase
ero cras, which means "Tomorrow I will come." And so we will see as we build up to Christmas through the O Antiphons, we build up to the coming of Christ - not only his first coming, but also for His second coming when the true reality of the world and his Kingship will be unveiled!
Each day of this octave before Christmas, I will post the antiphon as well as the scripture supporting it and the liturgical music that is still sung in the Church building up to the Eve of the great feast of Christmas. Of course, it is all in Latin, but hopefully my descriptions will make it more meaningful!
Most of this information was taken from: Catholic Eduction