John 15:26

(Didym. De Spir. Sanct.) The Holy Spirit He calls the Comforter, a name taken from His office, which is not only to relieve the sorrows of the faithful, but to fill them with unspeakable joy. Everlasting gladness is in those hearts, in which the Spirit dwells. The Spirit, the Comforter, is sent by the Son, not as Angels, or Prophets, or Apostles, are sent, but as the Spirit must be sent which is of one nature with the Divine wisdom and power that sends Him. The Son when sent by the Father, is not separated from Him, but abides in the Father, and the Father in Him. In the same way the Holy Spirit is not sent by the Son, and proceedeth from the Father, in the sense of change of place. For as the Father's nature, being incorporeal, is not local, so neither hath the Spirit of truth, Who is incorporeal also, and superior to all created things, a local nature. (ut sup.) He does not say, from God, or, from the Almighty, but, from the Father: because though the Father and God Almighty are the same, yet the Spirit of truth properly proceeds from God, as the Father, the Begetter. The Father and the Son together send the Spirit of truth: He comes by the will both of the Father and the Son.

Which Paul doth also. For when many wondered how that the Jews believed not, he brings in Prophets foretelling it of old, and declaring the cause; that their wickedness and pride were the cause of their unbelief. "Well then; if they kept not Thy saying, neither will they keep ours; if they persecuted Thee, therefore they will persecute us also; if they saw signs, such as none other man wrought; if they heard words such as none other spake, and profited nothing; if they hate Thy Father and Thee with Him, wherefore," saith one, "hast Thou sent us in among them? How after this shall we be worthy of belief? which of our kindred will give heed to us?" That they may not therefore be troubled by such thoughts, see what sort of comfort he addeth. "When the Comforter is come, whom I will send unto you from the Father, even the Spirit of Truth, which proceedeth from the Father, He shall testify of Me. And ye also shall bear witness, because ye have been with Me from the beginning." "He shall be worthy of belief, for He is the Spirit of Truth." On this account He called It not "Holy Spirit," but "Spirit of Truth." But the, "proceedeth from the Father," showeth that He knoweth all things exactly, as Christ also saith of Himself, that "I know whence come and whither I go", speaking in that place also concerning truth. "Whom will send." Behold, it is no longer the Father alone, but the Son also who sendeth. "And ye too," He saith, "have a right to be believed, who have been with Me, who have not heard from others." Indeed, the Apostles confidently rely on this circumstance, saying, "We who did eat and drink with Him." And to show that this was not merely said to please, the Spirit beareth witness to the words spoken.

(Tr. xcii. 2) As if He said, Seeing Me, they hated and killed Me: but the Comforter shall give such testimony concerning Me, as shall make them believe, though they see Me not. And because He shall testify, ye shall testify also: And ye also shall bear witness: He will inspire your hearts, and ye shall proclaim with your voices. And ye will preach what ye know; Because ye have been with Me from the beginning; which now ye do not do, because ye have not yet the fulness of the Spirit. But the love of God shall then be shed abroad in your hearts by the Spirit which shall be given you, and shall make you confident witnesses to Me. The Holy Spirit by His testimony made others testify; taking away fear from the friends of Christ's, and converting the hatred of His enemies into love. (Tr. xcix. 6, et sq.) If it be asked here whether the Holy Ghost proceeds from the Son also, we may answer thus: The Son is the Son of the Father alone, and the Father is the Father of the Son only; but the Holy Spirit is not the Spirit of one, but of both; since Christ Himself saith, The Spirit of your Father which speaketh in you. (Matt. 10:20) And the Apostle says, God hath sent the Spirit of His Son into your hearts. (Gal. 4:6) This indeed, I think, is the reason why He is called peculiarly the Spirit. For both of the Father and the Son separately we may pronounce, that each is a Spirit. But what each is separately in a general sense, He who is not either one separately, but the union of both, is spiritually. But if the Holy Spirit is the Spirit of the Son, why should we not believe that He proceeds from the Son? Indeed if He did not proceed from the Son, Christ would not after the resurrection have breathed on His disciples, and said, Receive ye the Holy Ghost. (John 20:29) This too is what is meant by the virtue which went out of Him, and healed all. (Luke 6.) If the Holy Ghost then proceeds both from the Father and the Son, why does Christ say, Who proceedeth from the Father? He says it in accordance with His general way of referring all that He has to Him from whom He is; as where He says, My doctrine is not Mine, but His that sent Me. If the doctrine was His, which He says was not His own, but the Father's, much more does the Holy Spirit proceed from Him, consistently with His proceeding from the Father. From whom the Son hath His Godhead, from Him He hath it that the Holy Ghost proceedeth from Him. And this explains why the Holy Spirit is not said to be born, but to proceed. For if He were born, He would be the Son of both Father and Son, an absurd supposition; for if two together have a Son, those two must be father and mother. But to imagine any such relation as this between God the Father, and God the Son, is monstrous. Even the human offspring does not proceed from father or mother at the same time; when it proceeds from the father, it does not proceed from the mother. Whereas the Holy Spirit does not proceed from the Father into the Son, and from the Son into the creature to be sanctified; but proceeds from Father and Son at once. And if the Father is life, and the Son is life, so the Holy Ghost is life also. Just then as the Father when He had life in Himself, gave also to the Son to have life in Himself; so He gave to the Son also that life should proceed from Him, even as it proceeded from Himself.

The Lord Jesus, in the discourse which He addressed to His disciples after the supper, when Himself in immediate proximity to His passion, and, as it were, on the eve of departure, and of depriving them of His bodily presence while continuing His spiritual presence to all His disciples till the very end of the world, exhorted them to endure the persecutions of the wicked, whom He distinguished by the name of the world: and from which He also told them that He had chosen, the disciples themselves, that they might know it was by the grace of God they were what they were, and by their own vices they had been what they had been. And then His own persecutors and theirs He clearly signified to be the Jews, that it might be perfectly apparent that they also were included in the appellation of that damnable world that persecuteth the saints. And when He had said of them that they knew not Him that sent Him, and yet hated both the Son and the Father, that is, both Him who was sent and Him who sent Him,-of all which we have already treated in previous discourses,-He reached the place where it is said, "This cometh to pass, that the word might be fulfilled that is written in their law, They hated me without a cause." And then He added, as if by way of consequence, the words whereon we have undertaken at present to discourse: "But when the Comforter is come, whom I will send unto you from the Father, even the Spirit of truth, who proceedeth from the Father, He shall bear witness of me: and ye also shall bear witness, because ye have been with me from the beginning." But what connection has this with what He had just said, "But now have they both seen and hated both me and my Father: but that the word might be fulfilled that is written in their law, They hated me without a cause"? Was it that the Comforter, when He came, even the Spirit of truth, convicted those, who thus saw and hated, by a still clearer testimony? Yea, verily, some even of those who saw, and still hated, He did convert, by this manifestation of Himself, to the faith that worketh by love. To make this view of the passage intelligible, we recall to your mind that so it actually befell. For when on the day of Pentecost the Holy Spirit fell upon an assembly of one hundred and twenty men, among whom were all the apostles; and when they, filled therewith were speaking in the language of every nation; a goodly number of those who had hated, amazed at the magnitude of the miracle (especially when they perceived in Peter's address so great and divine a testimony borne in behalf of Christ, as that He, who was slain by them and accounted amongst the dead, was proved to have risen again, and to be now alive), were pricked in their hearts and converted; and so became aware of the beneficent character of that precious blood which had been so impiously and cruelly shed, because themselves redeemed by the very blood which they had shed. For the blood of Christ was shed so efficaciously for the remission of all sins, that it could wipe out even the very sin of shedding it. With this therefore in His eye, the Lord said, "They hated me without a cause: but when the Comforter is come, He shall bear witness of me;" saying, as it were, They hated me, and slew me when I stood visibly before their eyes; but such shall be the testimony borne in my behalf by the Comforter, that He will bring them to believe in me when I am no longer visible to their sight.

Elsewhere He says that the Father sends the Spirit; now He says He does: Whom I will send unto you; thus declaring the equality of the Father and the Son. That He might not be thought however to be opposed to the Father, and to be another and rival source, as it were, of the Spirit, He adds, From the Father; i. e. the Father agreeing, and taking an equal part in sending Him. When it is said that He proceedeth, do not understand His procession to be an external mission, such as is given to ministering spirits, but a certain peculiar, and distinct procession, such as is true of the Holy Spirit alone. To proceed is not the same as being sent, but is the essential nature of the Holy Ghost, as coming from the Father.