«IESU REDEMPTOR OMNIUM-QUEM LUCIS». – This is the hymn of Vespers and Matins for the feast of Christmas, by an unknown author, dating from approximately the beginning of the 10th century.
The birth of Jesus ab aeterno, a theme particularly emphasized, indicates that the hymn was composed during the period of the Arian controversy. Begotten by the Father from all eternity, having come into the world from a virgin, he is reborn spiritually in every
«IESU REDEMPTOR OMNIUM-QUEM LUCIS» – IEZDEGERD I
man. These three births the entire universe greets with a new canticle.