for Hilary (De Trin. viii) shows that the "Spirit of God" sometimes means the Father, as in the words of Is. 61:1: "The Spirit of the Lord is upon me;" and sometimes the Son, as when the Son says: "In the Spirit of God I cast out devils" (Mt. 12:28), showing that He cast out devils by His own natural power; and that sometimes it means the Holy Ghost, as in the words of Joel 2:28: "I will pour out of My Spirit over all flesh." Therefore this name 'Holy Ghost' is not the proper name of a divine person.
Objection 2: Further, the names of the divine persons are relative terms, as Boethius says (De Trin.). But this name "Holy Ghost" is not a relative term. Therefore this name is not the proper name of a divine Person.
Objection 3: Further, because the Son is the name of a divine Person He cannot be called the Son of this or of that. But the spirit is spoken of as of this or that man, as appears in the words, "The Lord said to Moses, I will take of thy spirit and will give to them" (Num. 11:17) and also "The Spirit of Elias rested upon Eliseus" (4 Kgs. 2:15). Therefore "Holy Ghost" does not seem to be the proper name of a divine Person.
On the contrary, It is said (1 Jn. 5:7): "There are three who bear witness in heaven, the Father, the Word, and the Holy Ghost." As Augustine says (De Trin. vii, 4): "When we ask, Three what? we say, Three persons." Therefore the Holy Ghost is the name of a divine person.
I answer that, While there are two processions in God, one of these, the procession of love, has no proper name of its own, as stated above ( Question [27], Article [4], ad 3). Hence the relations also which follow from this procession are without a name ( Question [28], Article [4]): for which reason the Person proceeding in that manner has not a proper name. But as some names are accommodated by the usual mode of speaking to signify the aforesaid relations, as when we use the names of procession and spiration, which in the strict sense more fittingly signify the notional acts than the relations; so to signify the divine Person, Who proceeds by way of love, this name "Holy Ghost" is by the use of scriptural speech accommodated to Him. The appropriateness of this name may be shown in two ways. Firstly, from the fact that the person who is called "Holy Ghost" has something in common with the other Persons. For, as Augustine says (De Trin. xv, 17; v, 11), "Because the Holy Ghost is common to both, He Himself is called that properly which both are called in common. For the Father also is a spirit, and the Son is a spirit; and the Father is holy, and the Son is holy." Secondly, from the proper signification of the name. For the name spirit in things corporeal seems to signify impulse and motion; for we call the breath and the wind by the term spirit. Now it is a property of love to move and impel the will of the lover towards the object loved. Further, holiness is attributed to whatever is ordered to God. Therefore because the divine person proceeds by way of the love whereby God is loved, that person is most properly named "The Holy Ghost."
Reply to Objection 1: The expression Holy Spirit, if taken as two words, is applicable to the whole Trinity: because by 'spirit' the immateriality of the divine substance is signified; for corporeal spirit is invisible, and has but little matter; hence we apply this term to all immaterial and invisible substances. And by adding the word "holy" we signify the purity of divine goodness. But if Holy Spirit be taken as one word, it is thus that the expression, in the usage of the Church, is accommodated to signify one of the three persons, the one who proceeds by way of love, for the reason above explained.
Reply to Objection 2: Although this name "Holy Ghost" does not indicate a relation, still it takes the place of a relative term, inasmuch as it is accommodated to signify a Person distinct from the others by relation only. Yet this name may be understood as including a relation, if we understand the Holy Spirit as being breathed [spiratus].
Reply to Objection 3: In the name Son we understand that relation only which is of something from a principle, in regard to that principle: but in the name "Father" we understand the relation of principle; and likewise in the name of Spirit inasmuch as it implies a moving power. But to no creature does it belong to be a principle as regards a divine person; but rather the reverse. Therefore we can say "our Father," and "our Spirit"; but we cannot say "our Son."
Whether the Holy Ghost proceeds from the Son?
Objection 1: It would seem that the Holy Ghost does not proceed from the Son. For as Dionysius says (Div. Nom. i): "We must not dare to say anything concerning the substantial Divinity except what has been divinely expressed to us by the sacred oracles." But in the Sacred Scripture we are not told that the Holy Ghost proceeds from the Son; but only that He proceeds from the Father, as appears from Jn. 15:26: "The Spirit of truth, Who proceeds from the Father." Therefore the Holy Ghost does not proceed from the Son.
Objection 2: Further, In the creed of the council of Constantinople (Can. vii) we read: "We believe in the Holy Ghost, the Lord and Life-giver, who proceeds from the Father; with the Father and the Son to be adored and glorified." Therefore it should not be added in our Creed that the Holy Ghost proceeds from the Son; and those who added such a thing appear to be worthy of anathema.
Objection 3: Further, Damascene says (De Fide Orth. i): "We say that the Holy Ghost is from the Father, and we name Him the spirit of the Father; but we do not say that the Holy Ghost is from the Son, yet we name Him the Spirit of the Son." Therefore the Holy Ghost does not proceed from the Son.
Objection 4: Further, Nothing proceeds from that wherein it rests. But the Holy Ghost rests in the Son; for it is said in the legend of St. Andrew: "Peace be to you and to all who believe in the one God the Father, and in His only Son our Lord Jesus Christ, and in the one Holy Ghost proceeding from the Father, and abiding in the Son." Therefore the Holy Ghost does not proceed from the Son.
Objection 5: Further, the Son proceeds as the Word. But our breath [spiritus] does not seem to proceed in ourselves from our word. Therefore the Holy Ghost does not proceed from the Son.
Objection 6: Further, the Holy Ghost proceeds perfectly from the Father. Therefore it is superfluous to say that He proceeds from the Son.
Objection 7: Further "the actual and the possible do not differ in things perpetual" (Phys. iii, text 32), and much less so in God. But it is possible for the Holy Ghost to be distinguished from the Son, even if He did not proceed from Him. For Anselm says (De Process. Spir. Sancti, ii): "The Son and the Holy Ghost have their Being from the Father; but each in a different way; one by Birth, the other by Procession, so that they are thus distinct from one another." And further on he says: "For even if for no other reason were the Son and the Holy Ghost distinct, this alone would suffice." Therefore the Holy Spirit is distinct from the Son, without proceeding from Him.
On the contrary, Athanasius says: "The Holy Ghost is from the Father and the Son; not made, nor created, nor begotten, but proceeding."
I answer that, It must be said that the Holy Ghost is from the Son. For if He were not from Him, He could in no wise be personally distinguished from Him; as appears from what has been said above ( Question [28], Article [3]; Question [30], Article
