Contrasting Augustine and Cyril of Jerusalem on the Identity of the One God

Between Augustine and earlier church fathers like Cyril of Jerusalem there exists a great deal of theological continuity. Both church fathers, for instance, worked to defend the divinity of the Son against the attacks of Arianism. But there are also some crucial areas of discontinuity between these two notable theologians.

As has been previously noted on this blog, Augustine was a strong early proponent of the idea that the one God of the Christian faith is the Trinity. We see this idea expressed in his own writings in the following:

“That one God, therefore, the Father and the Son and the Holy Spirit, who will not appear, except for joy which cannot be taken away from the just…” (On the Trinity, Book 1, Ch. 13)

“…neither here does it appear plainly whether it was any person of the Trinity that appeared to Abraham, or God Himself the Trinity, of which one God it is said, You shall fear the Lord your God, and Him only shall you serve.” (Book 2, Ch. 10)

“O Lord the one God, God the Trinity, whatever I have said in these books that is of Yours, may they acknowledge who are Yours; if anything of my own, may it be pardoned both by You and by those who are Yours. Amen.” (Book 15, Ch. 28)

In contrast, Cyril of Jerusalem, on the other hand, can be noted to be equally emphatic in proclaiming that the one God of the Christian faith is the person of the Father in particular:

“For there is One God, the Father of Christ; and One Lord Jesus Christ, the Only-begotten Son of the Only God; and One Holy Ghost…” On the Ten Points of Doctrine (Lecture IV)

“Of God as the sole Principle we have said enough to you yesterday:  by “enough” I mean, not what is worthy of the subject, (for to reach that is utterly impossible to mortal nature), but as much as was granted to our infirmity.  I traversed also the bye-paths of the manifold error of the godless heretics:  but now let us shake off their foul and soul-poisoning doctrine, and remembering what relates to them, not to our own hurt, but to our greater detestation of them, let us come back to ourselves, and receive the saving doctrines of the true Faith, connecting the dignity of Fatherhood with that of the Unity, and believing In One God the Father:  for we must not only believe in one God; but this also let us devoutly receive, that He is the Father of the Only-begotten, our Lord Jesus Christ.” The Father (Lecture VII)

“But worship thou One God the Almighty, the Father of our Lord Jesus Christ.” Almighty (Lecture VIII)

Although Augustine would allege the support of scripture for his position, in light of the language of scripture, it is clear which of these viewpoints actually represents the biblical position:

“There is one body and one Spirit, just as also you were called in one hope of your calling; one Lord, one faith, one baptism, one God and Father of all who is over all and through all and in all.” Ephesians 4:4-5 NAS

“This is eternal life, that they may know You, the only true God, and Jesus Christ whom You have sent.” John 17:3 NAS

“…yet for us there is but one God, the Father, from whom are all things and we exist for Him; and one Lord, Jesus Christ, by whom are all things, and we exist through Him.” 1 Corinthians 8:6 NAS

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