“On all days and at all times, dearly beloved, does the birth of our Lord and Saviour from the Virgin-mother occur to the thoughts of the faithful, who meditate on divine things, that the mind may be aroused to the acknowledgment of its Maker, and whether it be occupied in the groans of supplication, or in the shouting of praise, or in the offering of sacrifice, may employ its spiritual insight on nothing more frequently and more trustingly than on the fact that God the Son of God, begotten of the co-eternal Father, was also born by a human birth. But this Nativity which is to be adored in heaven and on earth is suggested to us by no day more than this when, with the early light still shedding its rays on nature , there is borne in upon our senses the brightness of this wondrous mystery. For the angel Gabriel's converse with the astonished Mary and her conception by the Holy Ghost as wondrously promised as believed, seem to recur not only to the memory but to the very eyes. For today the Maker of the world was born of a Virgin's womb, and He, who made all natures, became Son of her, whom He created. Today the Word of God appeared clothed in flesh, and That which had never been visible to human eyes began to be tangible to our hands as well. Today the shepherds learned from angels' voices that the Saviour was born in the substance of our flesh and soul; and today the form of the Gospel message was pre-arranged by the leaders of the Lord's flocks , so that we too may say with the army of the heavenly host: Glory in the highest to God, and on earth peace to men of good will.” Pope St. Leo the Great, Sermon 26