From St. Augustine’s Sermon 191 on the Feast of the Nativity:
1.1 Verbum patris per quod facta sunt tempora, caro factum, natalem suum nobis fecit in tempore: in ortu humano habere voluit unum diem, sine cuius nutu divino nullus volvitur dies.
2 ipse apud patrem praecedit cuncta spatia saeculorum: ipse de matre in hac die cursibus se ingessit annorum.
3 homo factus, hominis factor: ut sugeret ubera, regens sidera; ut esuriret panis, ut sitiret fons, dormiret lux, ab itinere via fatigaretur, falsis testibus veritas accusaretur, iudex vivorum et mortuorum a iudice mortali iudicaretur, ab iniustis iustitia damnaretur, flagellis disciplina caederetur, spinis botrus coronaretur, in ligno fundamentum suspenderetur, virtus infirmaretur, salus vulneraretur, vita moreretur;
4 ad haec atque huiusmodi sustinenda pro nobis indigna, ut liberaret indignos; quando nec ille aliquid mali, qui propter nos tanta pertulit mala, nec nos boni aliquid merebamur, qui per eum tanta accepimus bona: propter haec ergo, qui erat ante omnia saecula sine initio dierum dei filius, esse in novissimis diebus dignatus est hominis filius; et qui de patre natus, non a patre factus erat, factus est in matre quam fecerat; ut ex illa ortus hic aliquando esset, quae nisi per illum nunquam et nusquam esse potuisset.
1.1 The Word of the father through Whom time was made, made flesh, did make for us in time his birthday: at His human birth He willed to have one day, without Whose Divine assent no day is born.
2 He, with his Father, precedes all the space of ages: He, from his Mother, on this day plunged into the race of years.
3 Man’s own maker, made man: to suck the breasts and rule the stars; as Bread to hunger, as Font to thirst, as Light to slumber, as Way from walk to weary, by the false as Truth to be accused, as Judge of the quick and dead by mortal judge to be judged, as Justice by the unjust to be condemned, as Holy Discipline to be whipped with scourges, as Grape Vine to be crowned with thorns, on the wood as Foundation to be suspended, as Power to be made weak, as Salvation to be wounded, as Life to die;
4 to suffer these and such outrages for us, to free us the outrageous; He, who for us endured such mighty evil, no evil deserved; we, who through Him received such mighty good, no good deserved: and so for these reasons, He who was before all ages without beginning of days Son of God, deigned in these last days to be the Son of Man; and He who from the Father born was not by the Father made, was made in the Mother whom He had made; that from her now born He might be here sometime, she who but through Him could never and nowhere been.