From the Sermons of Pope St. Leo the Great

2nd for Christmas

The Almighty and merciful God, Whose nature is goodness, Whose will is power, and Whose work is mercy, did, at the very beginning of the world, as soon as the devil’s hatred had mortally poisoned us with the venom of his envy, foretell those remedies which His mercy had foreordained for our healing. He bade the serpent know that there was to be a Seed of the woman Who should yet bruise the swelling of his pestilential head; this Seed was none other than the Christ to come in the flesh, that God and Man in one Person, Who, being born of a Virgin, should, by His undefiled birth, damn the seducer of man.