If you are looking for some spiritual edification beyond Mass, look no further. Here are the Mattins lessons for the feast of the Nativity of Our Lord Jesus Christ as well as the Introit, my favorite in the Roman rite, for the third Mass of the day. As they say in the East, "Christ is born! Glorify Him!"
From Isaiah:
1 At the first time the land of Zabulon, and the land of Nephtali was lightly touched: and at the last the way of the sea beyond the Jordan of the Galilee of the Gentiles was heavily loaded.
2 The people that walked in darkness, have seen a great light: to them that dwelt in the region of the shadow of death, light is risen.
3 Thou hast multiplied the nation, and hast not increased the joy. They shall rejoice before thee, as they that rejoice in the harvest, as conquerors rejoice after taking a prey, when they divide the spoils.
4 For the yoke of their burden, and the rod of their shoulder, and the sceptre of their oppressor thou hast overcome, as in the day of Median.
5 For every violent taking of spoils, with tumult, and garment mingled with blood, shall be burnt, and be fuel for the fire.
6 For a child is born to us, and a son is given to us, and the government is upon his shoulder: and his name shall be called, Wonderful, Counsellor, God the Mighty, the Father of the world to come, the Prince of Peace.
2 The people that walked in darkness, have seen a great light: to them that dwelt in the region of the shadow of death, light is risen.
3 Thou hast multiplied the nation, and hast not increased the joy. They shall rejoice before thee, as they that rejoice in the harvest, as conquerors rejoice after taking a prey, when they divide the spoils.
4 For the yoke of their burden, and the rod of their shoulder, and the sceptre of their oppressor thou hast overcome, as in the day of Median.
5 For every violent taking of spoils, with tumult, and garment mingled with blood, shall be burnt, and be fuel for the fire.
6 For a child is born to us, and a son is given to us, and the government is upon his shoulder: and his name shall be called, Wonderful, Counsellor, God the Mighty, the Father of the world to come, the Prince of Peace.
1 Be comforted, be comforted, my people, saith your God.
2 Speak ye to the heart of Jerusalem, and call to her: for her evil is come to an end, her iniquity is forgiven: she hath received of the hand of the Lord double for all her sins.
3 The voice of one crying in the desert: Prepare ye the way of the Lord, make straight in the wilderness the paths of our God.
4 Every valley shall be exalted, and every mountain and hill shall be made low, and the crooked shall become straight, and the rough ways plain.
5 And the glory of the Lord shall be revealed, and all flesh together shall see, that the mouth of the Lord hath spoken.
6 The voice of one, saying: Cry. And I said: What shall I cry? All flesh is grass, and all the glory thereof as the flower of the field.
7 The grass is withered, and the flower is fallen, because the spirit of the Lord hath blown upon it. Indeed the people is grass:
8 The grass is withered, and the flower is fallen: but the word of our Lord endureth for ever.
2 Speak ye to the heart of Jerusalem, and call to her: for her evil is come to an end, her iniquity is forgiven: she hath received of the hand of the Lord double for all her sins.
3 The voice of one crying in the desert: Prepare ye the way of the Lord, make straight in the wilderness the paths of our God.
4 Every valley shall be exalted, and every mountain and hill shall be made low, and the crooked shall become straight, and the rough ways plain.
5 And the glory of the Lord shall be revealed, and all flesh together shall see, that the mouth of the Lord hath spoken.
6 The voice of one, saying: Cry. And I said: What shall I cry? All flesh is grass, and all the glory thereof as the flower of the field.
7 The grass is withered, and the flower is fallen, because the spirit of the Lord hath blown upon it. Indeed the people is grass:
8 The grass is withered, and the flower is fallen: but the word of our Lord endureth for ever.
1 Arise, arise, put on thy strength, O Sion, put on the garments of thy glory, O Jerusalem, the city of the Holy One: for henceforth the uncircumcised, and unclean shall no more pass through thee.
2 Shake thyself from the dust, arise, sit up, O Jerusalem: loose the bonds from off thy neck, O captive daughter of Sion.
3 For thus saith the Lord: You were sold gratis, and you shall be redeemed without money.
4 For thus saith the Lord God: My people went down into Egypt at the beginning to sojourn there: and the Assyrian hath oppressed them without any cause at all.
5 And now what have I here, saith the Lord: for my people is taken away gratis. They that rule over them treat them unjustly, saith the Lord, and my name is continually blasphemed all the day long.
6 Therefore my people shall know my name in that day: for I myself that spoke, behold I am here.
2 Shake thyself from the dust, arise, sit up, O Jerusalem: loose the bonds from off thy neck, O captive daughter of Sion.
3 For thus saith the Lord: You were sold gratis, and you shall be redeemed without money.
4 For thus saith the Lord God: My people went down into Egypt at the beginning to sojourn there: and the Assyrian hath oppressed them without any cause at all.
5 And now what have I here, saith the Lord: for my people is taken away gratis. They that rule over them treat them unjustly, saith the Lord, and my name is continually blasphemed all the day long.
6 Therefore my people shall know my name in that day: for I myself that spoke, behold I am here.
From St. Leo the Great, Pope of Rome:
Dearly beloved brethren, Unto us is born this day a Saviour. Let us rejoice. It would be unlawful to be sad to-day, for today is Life's Birthday; the Birthday of that Life, Which, for us dying creatures, taketh away the sting of death, and bringeth the bright promise of the eternal gladness hereafter. It would be unlawful for any man to refuse to partake in our rejoicing. All men have an equal share in the great cause of our joy, for, since our Lord, Who is the destroyer of sin and of death, findeth that all are bound under the condemnation, He is come to make all free. Rejoice, O thou that art holy, thou drawest nearer to thy crown! Rejoice, O thou that art sinful, thy Saviour offereth thee pardon! Rejoice also, O thou Gentile, God calleth thee to life! For the Son of God, when the fulness of the time was come, which had been fixed by the unsearchable counsel of God, took upon Him the nature of man, that He might reconcile that nature to Him Who made it, and so the devil, the inventor of death, is met and beaten in that very flesh which hath been the field of his victory.
When our Lord entered the field of battle against the devil, He did so with a great and wonderful fairness. Being Himself the Almighty, He laid aside His uncreated Majesty to fight with our cruel enemy in our weak flesh. He brought against him the very shape, the very nature of our mortality, yet without sin. His birth however was not a birth like other births for no other is born pure, nay, not the little child whose life endureth but a day on the earth. To His birth alone the throes of human passion had not contributed, in His alone no consequence of sin had had -part. For His Mother was chosen a Virgin of the kingly lineage of David, and when she was to grow heavy with the sacred Child, her soul had already conceived Him before her body. She knew the counsel of God announced to her by the Angel, lest the unwonted events should alarm her. The future Mother of God knew what was to be wrought in her by the Holy Ghost, and that her modesty was absolutely safe.
Therefore, dearly beloved brethren, let us give thanks to God the Father, through His Son, in the Holy Ghost: Who, for His great love wherewith He loved us, hath had mercy on us and, even when we were dead in sins, hath quickened us together with Christ, that in Him we might be a new creature, and a new workmanship. Let us then put off the old man with his deeds (Col. iii. 9); and, having obtained a share in the Sonship of Christ, let us renounce the deeds of the flesh. Learn, O Christian, how great thou art, who hast been made partaker of the Divine nature, and fall not again by corrupt conversation into the beggarly elements above which thou art lifted. Remember Whose Body it is Whereof thou art made a member, and Who is its Head. Remember that it is He That hath delivered thee from the power of darkness and hath translated thee into God's light, and God's kingdom.
From St. Gregory the Great, Pope of Rome:
By God's mercy we are to say three Masses to-day, so that there is not much time left for preaching; but at the same time the occasion of the Lord's Birth-day itself obliges me to speak a few words. I will first ask why, when the Lord was to be born, the world was enrolled? Was it not to herald the appearing of Him by Whom the elect are enrolled in the book of life? Whereas the Prophet saith of the reprobate Let them be blotted out of the book of the living, and not be written with the righteous. Then, the Lord is born in Bethlehem. Now the name Bethlehem signifieth the House of Bread, and thus it is the birth-place of Him Who hath said, I am the Living Bread, Which came down from heaven. We see then that this name of Bethlehem was prophetically given to the place where Christ was born,.because it was there that He was to appear in the flesh by Whom the souls of the faithful are fed unto life eternal. He was born, not in His Mother's house, but away from home. And this is a mystery, showing that this our mortality into which He was born was not the home of Him Who is begotten of the Father before the worlds.
From St. Ambrose, Bishop of Milan:
Behold the beginning of the Church. Christ is born, and the shepherds watch; shepherds, to gather together the scattered sheep of the Gentiles, and to lead them into the fold of Christ, that they might no longer be a prey to the ravages of spiritual wolves in the night of this world's darkness. And that shepherd is wide awake, whom the Good Shepherd stirreth up. The flock then is the people, the night is the world, and the shepherds are the Priests. And perhaps he is a shepherd to whom it is said, Be watchful and strengthen, for God hath ordained as the shepherds of His flock not Bishops only, but also Angels.
From St. Augustine, Bishop of Hippo
Lest thou shouldest think all things mean, as thou art accustomed to think of things human, hear and digest this The Word was God. Now perhaps there will come forward some Arian unbeliever, and say that the Word of God was a creature. How can the Word of God be a creature, when it was by the Word that all creatures were made? If He be a creature, then there must have been some other Word, not a creature, by which He was made. And what Word is that? If thou sayest that it was by the word of the Word Himself that He was made, I tell thee that God had no other, but One Only-begotten Son. But if thou say not that it was by the word of the Word Himself that He was made, thou art forced to confess that. He by Whom all things were made was not Himself made at all. Believe the Gospel.