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“Augustine on The Trinity and The Holy Spirit (text 4)”
from In Evangelium Ioannis tractatus, 99: 6 - 9
Click here for text 1 on this theme from Augustine, and here for text 2, and here for text 3.
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      Relevant 
    books Many Augustine 
    translations A selection below Peter Brown biography -------- Allan Fitzgerald -------- Henry Chadwick -------- William Harmless. -------- Henry Chadwick's translation of "Confessions" -------- R.W.Dyson's translation of "The City of God" -------- R.P.H. Green's translation of "On Christian Teaching" -------- Gareth Matthews' translation of "On The Trinity" (books 8 - 15) 
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6. Some one may here inquire whether the Holy Spirit proceedeth also from the 
Son. For the Son is Son of the Father alone, and the Father is Father of the Son 
alone; but the Holy Spirit is not the Spirit of one of them, but of both. You 
have the Lord Himself saying, “For it is not ye that speak, but the Spirit of 
your Father that speaketh in you;” and you have the apostle, “God hath sent 
forth the spirit of His Son into your hearts.” Are there, then, two, the one of 
the Father, the other of the Son? Certainly not. For there is “one body,” he 
said, when referring to the Church; and presently added, “and one Spirit.” And 
mark how he there makes up the Trinity. “As ye are called,” he says, “in one 
hope of your calling.” “One Lord,” where he certainly meant Christ to be 
understood; but it remained that he should also name the Father: and accordingly 
there follows, “One faith, one baptism, one God and Father of all, who is above 
all, and through all, and in you all.” And since, then, just as there is one 
Father, and one Lord, namely, the Son, so also there is one Spirit; He is 
doubtless of both: especially as Christ Jesus Himself saith, “The Spirit of your 
Father that dwelleth in you;” and the apostle declares, “God hath sent forth the 
Spirit of His Son into your hearts.” You have the same apostle saying in another 
place, “But if the Spirit of Him that raised up Jesus from the dead dwell in 
you,” where he certainly intended the Spirit of the Father to be understood; of 
whom, however, he says in another place, “But if any man have not the Spirit of 
Christ, he is none of His.” And many other testimonies there are, which plainly 
show that He, who in the Trinity is styled the Holy Spirit, is the Spirit both 
of the Father and of the Son.  
 
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original Latin text
from Tractates on the Gospel of John 99
Holy Spirit proceeding from The Father and The Son
Augustine and double procession of the Holy Spirit
Migne Latin
Patrologiae Latinae Cursus Completus
Patrologia Latina