VII–X. Conception, assumption, and nativity of the human nature
VII. Further, of the human nature are considered conception, assumption, and nativity.
VIII. Conception is that by which, by a singular operation of the Holy Spirit, it began to exist in the womb of the virgin Mary from her own seed. This is taught in Genesis 3:15; Isaiah 7:14; Matthew 1:18,20; Luke 1:30-31 — and indeed supernaturally and by the immediate power of the Holy Spirit, in respect of which He is singularly called not begotten but made (Romans 1:3; Galatians 4:4), and holy (Luke 1:34-35; Hebrews 7:26), and is compared with the first Adam not as to the matter of the body but as to the mode of conception (Romans 5:14; 1 Corinthians 15:45,47).
IX. The assumption of human nature by the Word is that by which the Son of God, at the very first moment of conception, bestowed His own personality on that human substance in Marys womb that was properly without subsistence or personality. For Leo the Great rightly says (epistle XI): Our nature was not so assumed that it was first created and afterward assumed, but that it was created by the very assumption — lest anyone suppose the humanity existed before it was united to the Word. Compare Hebrews 2:16; Colossians 2:9; Philippians 2:7.
X. Nativity is that by which the Son of God was brought forth into the light as a true human from the virgin Mary at the mature and lawful time of birth. From the prediction of Moses (Genesis 49:10) and of Isaiah 7:14; Micah 5:2; Luke 2:6-7,22-23 teaches Christs birth, as also Paul in Galatians 4:4.
Latin
VII. Humanae naturae porro consideratur conceptio, assumptio & nativitas. VIII. Conceptio est, qua, singulari quadam Spiritus S. operatione, ea in utero Mariae virginis ex eiusdem semine exsistere coepit. Id docetur Gen. 3:15; Esa. 7:14; Matth. 1:18,20; Luc. 1:30-31 — & quidem supernaturaliter & immediata Spiritus S. virtute, cuius respectu singulariter non genitus, sed factus dicitur Rom. 1:3; Gal. 4:4; & sancte, Luc. 1:34-35; Heb. 7:26; & comparatur cum primo Adamo, non quod ad corporis materiam, sed quod ad conceptionis modum, Rom. 5:14; 1 Cor. 15:45,47. IX. Assumptio humanae naturae a Verbo est, qua Filius Dei substantiam illam humanam in utero Mariae, proprie subsistentiae sive personalitatis expertem, primo statim conceptionis momento, suam personalitatem largitus est. Nam recte Leo Magnus ep. XI: Natura, inquit, nostra non sic assumpta est, ut prius creata post assumeretur, sed ut ipsa assumptione crearetur. Ne quis forte existimet humanitatem exstitisse antequam Verbo uniretur. Confer Heb. 2:16; Col. 2:9; Phil. 2:7. X. Nativitas est, qua Filius Dei a Maria virgine maturo & legitimo pariendi tempore verus homo in lucem editus est. Ex praedictione Mosis Gen. 49:10 & Esaiae 7:14; Mich. 5:2; Lucas 2:6-7,22-23 natalia Christi docet, ut & Paulus Gal. 4:4.