Reply Obj. 3: According to Damascene (De Fide Orth. ii, 9), "unbegotten" in one sense signifies the same as "uncreated"; and thus it applies to the substance, for thereby does the created substance differ from the uncreated. In another sense it signifies what is not begotten, and in this sense it is a relative term; just as negation is reduced to the genus of affirmation, as "not man" is reduced to the genus of substance, and "not white" to the genus of quality. Hence, since "begotten" implies relation in God, "unbegotten" belongs also to relation. Thus it does not follow that the Father unbegotten is substantially distinguished from the Son begotten; but only by relation; that is, as the relation of Son is denied of the Father.
Reply Obj. 4: In every genus there must be something first; so in the divine nature there must be some one principle which is not from another, and which we call "unbegotten." To admit two innascibles is to suppose the existence of two Gods, and two divine natures. Hence Hilary says (De Synod.): "As there is one God, so there cannot be two innascibles." And this especially because, did two innascibles exist, one would not be from the other, and they would not be distinguished by relative opposition: therefore they would be distinguished from each other by diversity of nature.
Reply Obj. 5: The property of the Father, whereby He is not from another, is more clearly signified by the removal of the nativity of the Son, than by the removal of the procession of the Holy Ghost; both because the procession of the Holy Ghost has no special name, as stated above (Q. 27, A. 4, ad 3), and because also in the order of nature it presupposes the generation of the Son. Hence, it being denied of the Father that He is begotten, although He is the principle of generation, it follows, as a consequence, that He does not proceed by the procession of the Holy Ghost, because the Holy Ghost is not the principle of generation, but proceeds from the person begotten. _______________________
QUESTION 34
OF THE PERSON OF THE SON
(In Three Articles)
We next consider the person of the Son. Three names are attributed to the Son—namely, "Son," "Word," and "Image." The idea of Son is gathered from the idea of Father. Hence it remains for us to consider Word and Image.
Concerning Word there are three points of inquiry:
(1) Whether Word is an essential term in God, or a personal term?
(2) Whether it is the proper name of the Son?
(3) Whether in the name of Word is expressed relation to creatures? _______________________