For several days before the feast, the holy Church will celebrate this wondrous mystery in the spiritual hymns of her daily services.
These hymns remind us of our divine birthright, and the squandering of our sonship through sin; of its restoration through repentance of our common spiritual kinship and of the spirit of love and care for one another.
[…] God became man to save His people from their sin (Mt 1:21). For this reason He is called Jesus, which means Saviour.
And so, it was for our salvation that the Lord came to earth and became man, for the regeneration in us of the image of God which had fallen.
The Son of God became the Son of Man in order to make us sons of God who were the children of wrath and eternal damnation; in the words of the Holy Apostle John the Theologian: that we should be called the sons of God (I Jn 3:1).
Now God became man, that He may make Adam a god (Stichera for lauds of Annunciation). O the unutterable love of God! O the unspeakable compassion of the Lord! And He, the Most Holy, did this.
He deified mankind in His chosen ones, cleansed them from all evil both of soul and body, sanctified, glorified, led them from corruption to everlasting life, made them worthy to stand in blessedness before the terrible throne of His glory.
And He deified us also, brothers and sisters; He gave us a new birth through water and the Holy Spirit, sanctified us, made us His sons, gave us the promise of eternal life and eternal blessings, surpassing all telling and imagining.
And in confirmation, as a surety of the future blessings, He gave to us, still here on earth, the Holy Spirit to dwell in our hearts: God hath sent forth the Spirit of His Son into your hearts, crying, Abba, Father (Gal 4:6) writes the Apostle.
And so, my brothers, the feast of the Nativity of Christ reminds us that we are born of God, that we are sons of God, that we have been saved from sin and that we must live for God and not sin; not for flesh and blood, not for the whole world which lies in evil and wickedness (1 Jn 5:19), not for earthly corruption.
We must live for an inheritance incorruptible, and undefiled, and that fadeth not away, reserved in heaven for you (1 Pet 1:4), and for which the Lord Himself will give you a sign: behold, a virgin shall conceive, and bear a son, and shall call his name Emmanuel, (Isa 7:14).
John of Kronstadt (1829-1908; Russian Orthodox): The Nativity of Christ: The Feast of Renewal from Orthodox Heritage Vol. 11, Issue 11-12 @ ΑΠΑΝΤΑ ΟΡΘΟΔΟΞΙΑΣ.