"I believe the Spirit to proceed from no other source than from the Father through the Son
." Tertullian, Against Praxeas, 4:1 (A.D. 216).
"Therefore the Spirit is said to receive from Christ
, and Christ Himself from the Father." Marius Victorinus, Against Arium, I:12 (c. A.D. 355).
"Concerning the Holy Spirit I ought not to be silent, and yet I have no need to speak; still, for the sake of those who are in ignorance, I cannot refrain. There is no need to speak, because we are bound to confess Him, proceeding, as He does, from Father and Son
." Hilary of Poitiers, On the Trinity, 2:29 (A.D. 357).
"For the present I forbear to expose their license of speculation, some of them holding that the Paraclete Spirit comes from the Father or from the Son. For our Lord has not left this in uncertainty, for after these same words He spoke thus,-- 'I have yet many things to say unto you, but ye cannot bear them now. When He, the Spirit of truth, is come, He shall guide you into all truth: for He shall not speak from Himself: but what things soever He shall hear, these shall He speak; and He shall declare unto you the things that are to come. He shall glorify Me: for He shall receive of Mine and stroll declare it unto you. All things whatsoever the Father hath are Mine: therefore said I, He shall receive of Mine and shall declare it unto you' (John 16:12-15). Accordingly He receives from the Son, Who is both sent by Him, and proceeds from the Father. Now I ask whether to receive from the Son is the same thing as to proceed from the Father. But if one believes that there is a difference between receiving from the Son and proceeding from the Father, surely to receive from the Son and to receive from the Father will be regarded as one and the same thing
." Hilary of Poitiers, On the Trinity, 8:20 (A.D. 357).
"For He, as as been said, gives to the Spirit, and whatever the Spirit hath, He hath from the Word
." Athanasius, Against the Arians, III:24 (A.D. 362).
"The Holy Spirit ... is ever with the Father and the Son, and is from God, proceeding from the Father and receiving of the Son
." Epiphanius, The Man Well-Anchore, 7 (A.D. 374).
"The Spirit is God, from the Father and the Son
." Epiphanius, The Man Well-Anchored, 9 (A.D. 374).
"[N]either does any know the Spirit but the Father and the Son, the Persons from whom he proceeds and from whom He receives
." Epiphanius, The Man Well-Anchored, 11 (A.D. 374).
"God ...is Life, the Son Life from Life, and the Holy Spirit flows from both
; the Father is Light, the Son is Light, the Holy Spirit the third from Father and Son." Epiphanius, The Man Well-Anchored, 70 (A.D. 374).
"The Father always existed and the Son always existed, and the Spirit breathes forth from the Father and the Son
..." Epiphanius, The Man Well-Anchored, 75 (A.D. 374).
"Thus the way of the knowledge of God lies from One Spirit through the One Son to the One Father, and conversely the natural Goodness and the inherent Holiness and the royal Dignity extend from the Father through the Only-begotten to the Spirit
. Thus there is both acknowledgment of the hypostases and the true dogma of the Monarchy is not lost." Basil, On the Holy Spirit, 18:47 (A.D. 375).
"If ever there was a time when the Father was not, then there was a time when the Son was not. If ever there was a time when the Son was not, then there was a time when the Spirit was not
." Gregory of Nazianen, 5th Oration (31), 3 (A.D. 380).
"Our Lord teaches that the being of the Spirit is derived not from the Spirit Himself, but from the Father and the Son; He goes forth from the Son
, proceeding from the Truth; He has no subsistence but that which is given Him by the Son." Didymus the Blind of Alexandria, The Holy Spirit, 37 (ante A.D. 381).
"Our Lord teaches that the being of the Spirit is derived not from the Spirit Himself, but from the Father and the Son
; He goes forth from the Son, proceeding from the Truth; He has no subsistence but that which is given Him by the Son." Didymus the Blind, The Holy Spirit, 37 (ante A.D. 381).
"The Holy Spirit also, when He proceeds from the Father and the Son
, is not separated from the Father nor separated from the Son. For how could He be separated from the Father Who is the Spirit of His mouth? Which is certainly both a proof of His eternity, and expresses the Unity of this Godhead." Ambrose, The Holy Spirit, 1:11:120 (A.D. 381).
"The Holy Spirit is from the Father and the Son
, not made nor created, nor begotten, but proceeding." Athanasian Creed (A.D. 400).
"And the Holy Spirit, according to the Holy Scriptures, is neither of the Father alone, nor of the Son alone, but of both
." Augustine, On the Trinity, ,XV:17,27 (A.D. 408).
"Inasmuch as the Son is God and is by nature from God, the Spirit is His own, and is both in Him and from Him
." Cyril of Alexandria, In Joel, 2:28 (A.D. 427).
"He is the Spirit both of the Father and of the Son
, seeing that He is poured forth in a way of essence from Both or in other words, from the Father through the Son." Cyril of Alexandria, Worship and Adoration, 1 (A.D. 429). http://www.scripturecatholic.com/the_holy_spirit.html
Does it really matter whether or not one acknowledges that the Holy Spirit proceeds from not only the Father but also the Son?