This semester I am taking two introductory classes on Christian doctrine, both of which require me to write a 10-12 page credo, simply expressing what I believe about every topic covered in class. I started work on one of these recently, and for fun I thought I’d share my section on the Trinity. (Yes, I will be posting the full credos as PDFs when I’m finished.)
There is only one God, one true divine being with one single essence or ousia. He is a single Subject, indivisible, who cannot be broken apart. Yet it belongs to the one divine essence to subsist in three distinct Persons, revealed as the Father, the Son, and the Holy Spirit. Each Person is fully and entirely God, possessing the fullness of the one divine nature in unity with the other Persons. God thus exists as a unity-in-trinity, or a trinity-in-unity, in which the single divine ousia exists in a trifold mode of three hypostases. The Persons are each distinguished not by any divine attributes of which one person has more or less, for they are all entirely equal and divine, but by their relations to each other. The Father is the Father precisely because He is Father of the Son, for example. Apart from these internal relational distinctions, there is no possible essential or eternal difference to draw between the Persons of the Trinity. They are each essentially equal in power, glory, wisdom, authority, and love. They share one will, intelligence, and emotional life. There is no hierarchy, supremacy, or subordination of any kind within the immanent/ontological Trinity. The Father is an unqualified equal to the Son who is an unqualified equal to the Spirit who is an unqualified equal to the Father. Each has the fullness of the one divine nature, the one divine nature which itself constitutes them as relations of one God. The divine nature both constitutes the relations of the Triune Persons and is constituted by their relations. In these relations, the Father eternally begets the Son, and the Father and the Son eternally spirate the Spirit, but in these cases the generation neither compromises the aseity of each member nor defines some kind of ontological contingency. Neither should the begetting of the Son of the procession of the Spirit be seen as Persons originating from the unoriginate Person of the Father, but rather the Persons come from the being of the Father, the one ousia which each Person fully shares.
In history, God has expressed Himself in a unique Triune economy, and the way the Trinity is expressed in redemptive history is called the economic Trinity. In the economic Trinity, as a general pattern, the Father sends and initiates, the Son obeys and accomplishes, and the Spirit implements and consummates. In this economy the Father clearly takes the ultimate authority, this likely because of the correspondence with His eternal begetting of the Son and spiration of the Spirit. The Son is, in a certain sense, the fulfillment of God’s economy, as throughout the Old Testament and finally in the Incarnation He was (and remains) the personal, distinct, tangible appearance of God within creation. Throughout the whole of redemption, the Spirit acts as the agent of divine power, the one who accomplishes the supernatural divine will within natural space and time. These role distinctions are consistent and ultimate in human relationship to God, but they are not themselves internal to the divine being, though they in an imperfect and finite way reflect the internal Triune relations of God. They call forth a response for human faith and practice which seeks to worship the Father through the mediation of the Son by faithful union in the Spirit, and to do the will of the Father on the ground of the work of the Son in the power of the Holy Spirit.