The first of seven ancient antiphons, each used at vesper prayers in the seven days leading up to Christmas, each invoking Jesus with a different name and inviting meditation on a different attribute of His nature:

O Sapientia, quae ex ore Altissimi prodisti, attingens a fine usque ad finem fortiter, suaviter disponensque omnia; veni ad docendum nos viam prudentiae.

O Wisdom which camest out of the mouth of the most high, reaching from one end to another, mightily and sweetly ordering all things; come and shew us the way of understanding.

(Latin text found at Dappled Things, translation found at the website of St Peter's, Nottingham.)

The blog Godzdogz has more about the history and meaning of the Great Antiphons of Advent and will be posting a video clip each day of the antiphon being chanted over video of the music for the antiphon in Gregorian notation. Here is the video for O Sapientia.