Augustine on Christmas 2
Wake up! For you God was made man! “Arise, you who sleep, and rise from the dead, and Christ shall enlighten you” (Eph 5:14). For you, I say, God was made man! You would have been dead for eternity if he had not been born in time. You would never have been freed from sinful flesh if he had not taken up the likeness of sinful flesh (see Rm 8:3). Endless misery [miseria] would have possessed you if this mercy [misericordia] had not been accomplished. You would not have come back to life if he had not taken on your death. You would have faded away if he had not healed you. You would have perished if he had not come. ….
What greater grace of God could shine upon us than this: that, having an only Son, God should make him a son of man and that in turn He should make a son of man the Son of God. Look for some merit; look for a reason; look for the justice: and see whether you find anything but grace.
(Sermon 185, 1 and 3; PL 38, 998, 999)