Why There is Only One God: Relational Unity

In this concluding segment of the series on why there is only one God, we will examine how the relational unity between the persons of the Trinity does not allow Them to be conceived of as three Gods.

As we have observed in the earlier installments of this series, scripture clearly reserves the titles of “one God” and “only true God” for the person of the Father in particular. We have also observed that this is in no way due to a difference in divinity between the three persons; scripture is clear in revealing that God’s Son and Holy Spirit possess no other nature than His own, having the same divinity, or divine nature, as the one God, the Father. But how, if the persons of Son and Spirit are equal with the Father in respect to Their divine nature, do They not constitute second and third Gods?

The answer to that question is multifaceted; the Father alone is the one God because He alone is the Supreme Cause without a cause and the Supreme Authority with no higher authority. Additionally, the Son and Holy Spirit cannot constitute second and third Gods because They have the same divine nature as the Father, and because of Their relational unity with the Father. It is this last aspect of relational unity we shall examine in this post.

The three persons are truly distinct, but They are also inseparable.We see this unity between the persons spoken of throughout the gospel of John:

“No one has seen God at any time. The only begotten Son, who is in the bosom of the Father, He has declared Him.” (John 1:18 NKJV)

“but if I do, though you do not believe Me, believe the works, that you may know and believe that the Father is in Me, and I in Him.” (John 10:38 NKJV)

“Do you not believe that I am in the Father, and the Father in Me? The words that I speak to you I do not speak on My own authority; but the Father who dwells in Me does the works. Believe Me that I am in the Father and the Father in Me, or else believe Me for the sake of the works themselves.” (John 14:10-11 NKJV)

“At that day you will know that I am in My Father, and you in Me, and I in you.” (John 14:20 NKJV)

“Now I am no longer in the world, but these are in the world, and I come to You. Holy Father, keep through Your name those whom You have given Me, that they may be one as We are… that they all may be one, as You, Father, are in Me, and I in You; that they also may be one in Us, that the world may believe that You sent Me.” (John 17:11, 21 NKJV)

Because of this close unity between the persons, They are inseparable from one another. We also see, related to this, that God works through His Son and Spirit, in creation redemption, and judgement:

“By the Word of the Lord the heavens were made, And all the host of them by the Spirit of His mouth.” (Psalm 33:6)

“In the beginning was the Word, and the Word was with God, and the Word was God. 2 He was in the beginning with God. 3 All things were made through Him, and without Him nothing was made that was made.” (John 1:1-3 NKJV)

““The Lord possessed me at the beginning of His way, Before His works of old. 23 I have been established from everlasting, From the beginning, before there was ever an earth. 24 When there were no depths I was brought forth, When there were no fountains abounding with water. 25 Before the mountains were settled, Before the hills, I was brought forth; 26 While as yet He had not made the earth or the fields, Or the primal dust of the world. 27 When He prepared the heavens, I was there, When He drew a circle on the face of the deep, 28 When He established the clouds above, When He strengthened the fountains of the deep, 29 When He assigned to the sea its limit, So that the waters would not transgress His command, When He marked out the foundations of the earth, 30 Then I was beside Him as a master craftsman; And I was daily His delight, Rejoicing always before Him,” (Proverbs 8:22-30 KNJV)

“God, who at various times and in various ways spoke in time past to the fathers by the prophets, 2 has in these last days spoken to us by His Son, whom He has appointed heir of all things, through whom also He made the ages;” (Hebrews 1:1-2 NKJV, “worlds” changed to “ages” to reflect Greek)

“For there is one God and one Mediator between God and men, the Man Christ Jesus,” (1 Timothy 2:5 NKJV)

“For God so loved the world that He gave His only begotten Son, that whoever believes in Him should not perish but have everlasting life. 17 For God did not send His Son into the world to condemn the world, but that the world through Him might be saved.” (John 3:16-17 NKJV)

“But if the Spirit of Him who raised Jesus from the dead dwells in you, He who raised Christ from the dead will also give life to your mortal bodies through His Spirit who dwells in you.” (Romans 8:11 NKJV)

“For the Father judges no one, but has committed all judgment to the Son,… I can of Myself do nothing. As I hear, I judge; and My judgment is righteous, because I do not seek My own will but the will of the Father who sent Me.” (John 5:22, 30 NKJV)

So we see that in God’s actions, He works through His Son and Spirit, so that the actions are singular, although all three persons are involved in performing them. There are not three different acts of creation, three different schemes of redemption, or three different judgments of the world. Rather, there is a single creation, a single redemption of God’s people, and a single judgement of the world, executed by the one God through His only-begotten Son and His Holy Spirit, each person acting in Their specific roles in each of these actions.

On this Athanasius said “The Father does all things, by the Word, and in the Holy Spirit: And so the Unity of the Holy Trinity is preserved: And so one God is preached in the Church; even He who is over all, and through all, and in all: Over all, as he is the Father and Original and Fountain of all; Through all by His Word; and in all, by His Holy Spirit.” (Epistle Ad Serapion 1).

Additionally, we also see that God’s Son and Spirit are united with Him in that They are in perfect agreement of will and mind with Him. That does not mean, as those who Sabellianize intend it, that there is some sort of hive-mind controlling the persons of the Trinity, or that They are a single person; perish such a blasphemous thought. But rather we see that scripture teaches that the persons of the Trinity share one mind and one will meaning that They have a perfect agreement in Their wills and minds. In a similar way we see scripture regard the hearts and minds of many individual believers as being one heart and one mind:

“Now I am no longer in the world, but these are in the world, and I come to You. Holy Father, keep through Your name those whom You have given Me, that they may be one as We are.”(John 17:11 NKJV)

“Now the multitude of those who believed were of one heart and one soul; neither did anyone say that any of the things he possessed was his own, but they had all things in common.” Acts 4:32

So the persons of the Trinity, we see, are in perfect agreement of will and mind. We may reasonably suppose that this stems from Their all having the same divine nature; because of this, what They will and what They know is the same, and there is perfect agreement between Them.

So we see that God’s Son and Spirit are united with Him in close relational unity, in such a way that They are inseparable from Him, and He works through Them, and is always in perfect agreement with Them. They cannot then, in any legitimate sense, be thought to constitute second and third Gods as a result of some separation from Him, or disagreement with Him; but as a result of Their identities as the only-begotten Son and Holy Spirit of the only true God, They remain eternally in perfect union with Him, inseparable from Him, and in perfect agreement with Him.


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