In recent years there has been something of a revival of aspects of classical trinitarianism in Eastern Orthodoxy. Several prominent EO theologians have argued for a return to a Nicene understanding of the Trinity and the belief that the one God is the Father.
As in the last few centuries the Eastern church has undergone what some have referred to as a “patristic renaissance” it is no surprise to see their theology has moving away from a semi-modalistic direction and returning to what the Ante-Nicene and Nicene Fathers articulated regarding the one God being the person of the Father in particular.
I wanted to share a few quotes from some of these theologians below:
The same personalistic emphasis appears in the Greek Fathers’ insistence on the “monarchy” of the Father. Contrary to the concept which prevailed in the post-Augustinian West and in Latin Scholasticism, Greek theology attributes the origin of hypostatic “subsistence” to the hypostasis of the Father—not to the common essence. The Father is the “cause” (aitia) and the “principle” (archē) of the divine nature, which is in the Son and in the Spirit. What is even more striking is the fact that this “monarchy” of the Father is constantly used by the Cappadocian Fathers against those who accuse them of “tritheism”: “God is one,” writes Basil, “because the Father is one.” (Byzantine Theology, 2nd ed, 1983, page 183)
Among the Greek Fathers the unity of God, the one God, and the ontological “principal” or “cause” of the being and life of God does not consist in the one substance of God but in the hypostasis, that is, the person of the Father. The one God is not the one substance but the Father, who is the “cause” both of the generation of the Son and the procession of the Spirit. (Being As Communion, 1985, pages 40-41)
“… in the Bible, in the creeds, and in the Liturgy, it’s very important, really critically important, to note and to affirm and to remember that the one God in whom we believe, strictly speaking, is not the Holy Trinity. The one God is God the Father. In the Bible, the one God is the Father of Jesus Christ. He is God who sends his only-begotten Son into the world, and Jesus Christ is the Son of God. Then, of course, in a parallel manner, the Spirit, the Holy Spirit, is the Spirit of God, that the Holy Spirit, being the Spirit of God, is therefore also the Spirit of Christ, the Messiah, because the Christ is the Son of God, upon whom God the Father sends and affirms his Holy Spirit.” (From the online transcript of the podcast, The Holy Trinity)