de Nativitate Domini
Vere dignum et justum est, æquum et salutáre, nos tibi semper et ubíque grátias ágere: Dómine sancte, Pater omnípotens, ætérne Deus: Quia per incarnáti Verbi mystérium nova mentis nostræ óculis lux tuæ claritátis infúlsit: ut, dum visibíliter Deum cognóscimus, per hunc in invisibílium amorem rapiámur. Et ídeo cum Angelis et Archángelis, cum Thronis et Dominatiónibus cumque omni milítia cæléstis exércitus hymnum glóriæ tuæ cánimus, sine fine dicéntes.
Nativity
It is truly meet and just, right and for our salvation, that we should at all times, and in all places, give thanks unto Thee, O holy Lord, Father almighty, everlasting God, for through the Mystery of the Word made flesh, the new light of Thy glory hath shone upon the eyes of our mind, so that while we acknowledge God in visible form, we may through Him be drawn to the love of things invisible. And therefore with Angels and Archangels, with Throne and Dominations, and with all the hosts of the heavenly army, we sing the hymn of Thy glory, evermore saying: