Semi-modalists, wishing to make it seem as though the scriptures support their idea that the three persons of the Trinity are a single person, often rely heavily on the Old Testament for their arguments. In doing so, they twist the Old Testament scriptures contrary to their true meaning. This is a deceptive tactic that takes advantage of the fact that God’s revelation in scripture is progressive. The Old Testament did not deliver a full disclosure of all doctrinal truth to God’s people. Thus the New Testament is clear in speaking of the fact that some things were hidden in a mystery until the coming of Christ, when the mysteries were revealed, and a fuller knowledge was given:
“Of this salvation the prophets have inquired and searched carefully, who prophesied of the grace that would come to you, 11 searching what, or what manner of time, the Spirit of Christ who was in them was indicating when He testified beforehand the sufferings of Christ and the glories that would follow. 12 To them it was revealed that, not to themselves, but to us[b] they were ministering the things which now have been reported to you through those who have preached the gospel to you by the Holy Spirit sent from heaven—things which angels desire to look into.” (1 Peter 1:10-12 NKJV)
“Now to Him who is able to establish you according to my gospel and the preaching of Jesus Christ, according to the revelation of the mystery kept secret since the world began” (Romans 16:25 NKJV)
“However, we speak wisdom among those who are mature, yet not the wisdom of this age, nor of the rulers of this age, who are coming to nothing. 7 But we speak the wisdom of God in a mystery, the hidden wisdom which God ordained before the ages for our glory, 8 which none of the rulers of this age knew; for had they known, they would not have crucified the Lord of glory. 9 But as it is written: “Eye has not seen, nor ear heard, Nor have entered into the heart of man The things which God has prepared for those who love Him.” 10 But God has revealed them to us through His Spirit.” (1 Corinthians 2:6-10a NKKV)
“8 To me, who am less than the least of all the saints, this grace was given, that I should preach among the Gentiles the unsearchable riches of Christ, 9 and to make all see what is the fellowship[a] of the mystery, which from the beginning of the ages has been hidden in God who created all things through Jesus Christ;[b] 10 to the intent that now the manifold wisdom of God might be made known by the church to the principalities and powers in the heavenly places, 11 according to the eternal purpose which He accomplished in Christ Jesus our Lord, 12 in whom we have boldness and access with confidence through faith in Him.” (Ephesian 3:8-12 NKJV)
“of which I became a minister according to the stewardship from God which was given to me for you, to fulfill the word of God, 26 the mystery which has been hidden from ages and from generations, but now has been revealed to His saints. 27 To them God willed to make known what are the riches of the glory of this mystery among the Gentiles: which[d] is Christ in you, the hope of glory.” (Colossians 1:25-27 NKJV)
Even during the Lord’s earthy ministry, He left some things hidden as a mystery to most, only revealing the fullness of His teaching to the apostles privately:
“And He said to them, “To you it has been given to know the mystery of the kingdom of God; but to those who are outside, all things come in parables,” (Mark 4:11 NKJV)
Such was the nature of the law of bondage given through Moses, that through earthly and carnal types and shadows, the people might be lead away from idolatry and drawn up to spiritual and heavenly truths, delivered to them in a mystery. And likewise, because of the hardness of the peoples’ hearts, even the Lord Himself did not make known the fullness of divine revelation to them, but preached to them in parables.
The Old Testament scriptures then, although “written for our sakes”, and profitable for us, do not deliver the fullness of divine revelation in the fullness and clarity that we see in the New Testament, when type and shadow have given way to worship in spirit and truth, and a knowledge of divine mysteries hidden in ages past. For this reason then, Christians have historically interpreted the Old Testament in light of the New, since in the New we have a more clear and full revelation by which to understand the mysteries of the Old. Reason would have us interpret that which is less clear by that which is more clear; and on that basis, we must interpret the types of the Old Testament by the fulfillment and revelation of the New.
When we come to the doctrine of the Trinity then, it should not surprise us that we do not see it revealed in the same detail and clarity in the Old Testament as in the New. And yet, semi-modalists often treat the Old Testament with priority over the New in respect to trinitarian doctrine, because this allows them to twist the less-clear teachings of the Old Testament to their own ends.
For example, typically semi-modalists will establish the scripture’s teaching that there is only one God, not from the New Testament, but from the Old. They will quote passages that speak clearly about the fact that there is only one God, and no other, and yet do not usually clearly speak of how that fits within the doctrine of the Trinity. They then ignore the New Testament passages that are equally clear in teaching that there is one God, and also give detail on how this fits with the doctrine of the Trinity at the same time by explicitly identifying the one God as the person of the Father alone.
Instead of using the clarity offered by the New Testament as a starting point and an aid to interpreting the Old, semi-modalists want to treat them in a disjointed fashion and refuse to read the Old in light of the New on this subject. But if we start with the New Testament, we are able to easily understand not only that there is one God, but that this is the person of the Father. Once we understand this, we can easily understand that the person referred to as the “one God” in the Old Testament is the same person as in the New- the person of the Father.
We also see in the New Testament that usually the term “God” is used for the person of the Father, only being used for other persons in a few instances. Careful reflection on this point teaches us that the normal expectation we should have for what the word “God” refers to in scripture is the person of the Father, although we must examine context to see if it may be speaking of a different person. Yet this convention is ignored and contradicted by the semi-modalists, and when “God” is used in the Old Testament, instead of basing their understanding of what is referred to by it off of the New, and understanding that in most cases it refers to the person of the Father, they make up their own rules instead which have no warrant from scripture whatsoever.
They have invented their own hermeneutic, not drawn from scripture in the slightest, but contrary to it, that whenever the word “God” is used in scripture absolutely and without qualification, this must be understood to refer to the entire Trinity. This is an absurd proposition, but one that is necessary for their false teaching. By mutilating the meaning of the scriptures this way, they insert their false doctrine into the whole Bible.
If human authority can arbitrarily establish rules by which we must interpret scripture contrary to its natural meaning, then surely the semi-modalists cannot be argued against on this point. But if anyone will admit that we must interpret the Bible only by rules of interpretation founded upon sound reason and the way scripture itself teaches us to interpret it, then it will quickly be recognized that the semi-modalist hermeneutic must be rejected as a human contrivance designed to further the dogma of semi-modalism.
If the term “God” used absolutely and without qualification nearly always refers to the person of the Father in the New Testament, which is clear throughout, then what possible sense would it make to read the Old Testament differently? It makes no sense, as one God is the author of both Testaments, speaking through His one Word, authoring the scriptures by the inspiration of one Holy Spirit. The Old and New Testament are consistent with each other, not teaching one God in the Old, and a different God, the Father, in the New, but both Testaments teaching and affirming that there is only one God, the Father Almighty, Who created all things through His only-begotten Son.