NOTES for Mat 1:18-25
Today we celebrate a special service, the so-called Royal Hours or Hours of the Eve of the Nativity of Christ. At the Royal Hours we read several passages from the Old Testament, from the Epistle to the Hebrews, and the accounts by the evangelists Matthew and Luke of the Nativity. The most important thing in this unusual service is its emphatically Paschal character. In essence, it is almost an exact copy of those Hours that are celebrated on the day of Christ's death on the Cross, on Great Friday.
The Royal Hours both of Great Friday and of the Nativity of Christ were composed by Patriarch Sophronius of Jerusalem (d. 644) in the first half of the seventh century; their deep similarity is meant to mark the beginning and completion of God's saving action — the Nativity of Christ and His sacrifice on the Cross. These events reveal to us God's design as God's saving passage through our world, which is completed in the triumph of the Cross and the Resurrection.
And about why the Nativity takes place, St. Sophronius writes this: "As one descended from the line of David, Mariam was once being registered in Bethlehem with the elder Joseph while carrying in her womb the seedless Fruit; but when the time of the Nativity came, there was no place to stay, and the cave appeared to the Queen as a beautiful palace. Thus Christ is born in order to raise up His image that had fallen before." This means that the Nativity is the beginning of the way of the Cross, and this is exactly how the Church approaches it.