Great indeed was the faith of Abraham. . . It was necessary to go beyond human reasoning. . . to manifest also something more.
St. John Chrysostom
Homily XXV on Hebrews XI, 1,2. translation found in The Bible and the Holy Fathers for Orthodox, Monastery Books, St. Vladimir's Seminary Press, Crestwood, NY 2003, p. 955., 4th Century
The tribes of Judah and Levi were united by a fusion of their lines of descent, and that is why Matthew assigns Christ's family to the tribe of Judah. And the Apostle says, 'for our Lord has sprung out of Judah' (Heb. 7:14).
St. Ambrose of Milan
Seven Exegetical Works, 4th Century
I too will proclaim the greatness of this day: the Immaterial become incarnate, the Word is made flesh, the invisible makes itself seen, the intangible can be touched, the timeless has a beginning, the Son of God becomes the Son of Man, Jesus Christ, always the same, yesterday, today and forever. . . This is the solemnity we are celebrating today: the arrival of God among us, so that we might go to God, or more precisely, return to Him. . . Revere the nativity which releases you from the chains of evil. Honor this tiny Bethlehem which restores Paradise to you. Venerate this crib; because of it you who were deprived of meaning (logos) are fed by the divine Meaning, the divine Logos Himself.
St. Gregory the Theologian
Oration 38, For Christmas (Patrologia Graeca, 36, 664-5) found in The Roots of Christian Mysticism by Olivier Clement, New City Press, NY, p. 41, 330-390
Most of all we should marvel, that being Son of the Unorginate God, and His true Son, He suffered Himself to be called also Son of David, that He might make you Son of God. A slave became His father so that you a slave, might have the Lord as your Father. . .When therefore you are told that the Son of God is Son of David and of Abraham, do not doubt anymore that you too, the son of Adam, should become a son of God. For it was not randomly, nor in vain, that He did lower Himself so greatly, for He had in mind to exalt us. Thus He was born after the flesh, that you might be born after the Spirit.
St. John Chrysostom
Homily 2 on Matthew 1: 1-25, Nicene and Post-Nicene Fathers, 344/354-407
Pray, my brethren, to the Mother of God when the storm of enmity and malice bursts forth in your house. She, Who is all-merciful and all-powerful, can easily pacify the hearts of men. Peace and love proceed from the one God, as from their Source, and Our Lady - in God, as the Mother of Christ the Peace, is zealous, and prays for the peace of the whole world, and above all - of all Christians.
St. John of Kronstadt
My Life in Christ: Part 1, Holy Trinity Monastery pg. 179, 19th century
The Lord has given us a sign 'as deep as Sheol and as high as heaven', such as we should not have dared to hope for. How could we have expected to see a Virgin with Child, and to see in this Child a 'God with us' (Isaiah 7: 11 & 14) Who would descend into the depths of the earth to seek for the lost sheep, meaning the creature He had fashioned, and then ascend again to present to His Father humanity thus regained?
Irenaeus of Lyons
Against Heresies, III, 19.3 (SC 211, p. 380), 130-208