In the first centuries the Church had a beautiful custom of praying seven great prayers calling afresh on Christ to come, calling him by the mysterious titles he has in Isaiah, calling to him; O Wisdom! O Root! O Key! O Light! Come to us!
The evening prayer, also know as Vespers, always includes the great prayer of Mary known as the Magnificat. Each day, the Magnificat is preceded by a short verse or “antiphon” that links the prayer to the feast of the day or the season of the year. In the last seven days of Advent (December 17-24), the antiphons before the Magnificat are very special. Each begins with the exclamation “O” and ends with a plea for the Messiah to come. As Christmas approaches the cry becomes increasingly urgent.
These moving “O Antiphons” were composed when monks put together texts from the Old Testament, particularly from the prophet Isaiah, which looked forward to the coming of our salvation. They form a rich, interlocking mosaic of scriptural images. The great “O Antiphons” became very popular in the Middle Ages when it became traditional to ring the great bells of the church each evening as they were being sung.
Each of the O Antiphons highlights a different title for the Messiah: O Sapientia (O Wisdom), O Adonai (O Lord), O Radix Jesse (O Root of Jesse), O Clavis David (O Key of David), O Oriens (O Rising Sun), O Rex Gentium (O King of the Nations), and O Emmanuel. Also, each one refers to the prophecy of Isaiah of the coming of the Messiah. A particularly fascinating feature of the O Antiphons is that the first letter of each invocation, when read backwards, forms an acrostic in Latin: the first letters of Sapientia, Adonai, Radix, Clavis, Oriens, Rex, and Emmanuel in reverse form the Latin words: ERO CRAS. These can be understood as the words of Christ, responding to his people’s plea, saying “Tomorrow I will be there.”
This sonnet based on the first antiphon is composed by Malcolm Guite.
I cannot think unless I have been thought,
Nor can I speak unless I have been spoken.
I cannot teach except as I am taught,
Or break the bread except as I am broken.
O Mind behind the mind through which I seek,
O Light within the light by which I see,
O Word beneath the words with which I speak,
O founding, unfound Wisdom, finding me,
O sounding Song whose depth is sounding me,
O Memory of time, reminding me,
My Ground of Being, always grounding me,
My Maker’s Bounding Line, defining me,
Come, hidden Wisdom, come with all you bring,
Come to me now, disguised as everything.