Lecture 8: The Doctrine of the Trinity: Biblical Defense

The lecture, section by section

1. Do not outsource your theology

   The session opens with a working principle drawn from the teachers’ own conversations with Jehovah’s Witnesses: the cults train their members in pat answers to every trinitarian text, answers received rather than reasoned. The remedy is not counter-memorization but genuine wrestling. Students are told to open themselves to the other options, confident that Scripture rightly interpreted will hold, because a Trinity merely inherited is a tradition, while a Trinity worked through the text becomes conviction. The plan: oneness and plurality in the Old Testament, oneness and plurality in the New, the deity of Christ, the deity of the Spirit, and then the problem passages.

2. A chamber richly furnished but dimly lit

   Is the Trinity taught in the Old Testament? The teachers answer with care: the word appears in neither Testament, and no Old Testament saint could have articulated one God in three persons. B. B. Warfield’s picture governs the session: the Old Testament is a chamber richly furnished but dimly lit; the fuller light of the New brings nothing into the room that was not already there, but it shows clearly what was only dimly perceived. The mystery of the Trinity is not revealed in the Old Testament, yet it underlies it and here and there almost comes into view. The old saying compresses it: the new is in the old concealed, and the old is in the new revealed. So the Old Testament texts are read as obscurities, real features of the room, awaiting the light.

3. Oneness in the Old Testament

   The foundation is monotheism, and God laid it against two polytheistic worlds: Israel came out of Egypt’s many gods and marched toward Canaan’s. Yet the Shema of Deuteronomy 6 does not merely say I am the only God; its Hebrew declares the Lord is one, a word used elsewhere of composite unities, a cluster of grapes, the man and woman who become one flesh, so that the very confession of oneness leaves room for plurality within it. Isaiah says the rest plainly: I am the first and I am the last, and there is no God besides me, the sustained challenge of Isaiah 40 through 48 to every rival. And history sealed the doctrine: after the Babylonian exile, brought on by centuries of chasing other gods, Israel never again struggled with idolatry. Whatever the New Testament would say about Jesus, it would be said to convinced monotheists.

4. Plurality in the Old Testament

   Then the other side of the room. Elohim, the most common Old Testament name for God, is grammatically plural, literally the powerful ones, a plural of majesty that proves nothing on its own, since pagan gods received the same honorific, but that allows what is coming. Genesis 1:26 is stronger: let us make man in our image, plural pronouns, which Hebrew plurals of majesty do not extend to, followed immediately by the singular, so God created man in his own image, intent in the plural, act in the singular, exactly the grammar of one God in more than one person, however the first readers, who often guessed angels, may have puzzled over it. Isaiah 44 introduces two speakers each called Yahweh, the King of Israel and his Redeemer, the Lord of hosts. And Isaiah 48 gives the most startling line: the divine speaker who has been there from the beginning says, and now the Lord God has sent me, and his Spirit, God sent by God, with his Spirit, an obscurity no pre-Christian reader could resolve and no Christian reader can miss.

5. The son of man before the Ancient of Days

   Daniel 7 towers over the plurality texts. In the night visions one like a son of man comes with the clouds of heaven to the Ancient of Days and is given dominion, glory, and a kingdom, that all peoples, nations, and languages should serve him, an everlasting dominion that will not pass away. A human figure receiving the worship and the kingdom of God himself: the original readers saw a messianic figure they could not fully place. The New Testament places him. Son of man was Jesus’ own favorite self-designation, and at his trial in Mark 14, asked whether he is the Christ, he answers I am, and you will see the son of man sitting at the right hand of power and coming with the clouds of heaven. The high priest tears his robes and the council condemns him for blasphemy: they knew exactly which text he was claiming. Isaiah 9 belongs alongside it, the child born to us whose name is Wonderful Counselor, Mighty God, Everlasting Father, Prince of Peace, throne-names describing what he is, not labels on a birth certificate, and Mighty God among them. These stacked obscurities, the teachers add, are themselves an evidence for inspiration: only the one Author who knew the ending writes riddles for a thousand years and resolves them all.

6. Oneness in the New Testament, and the worship of Jesus

   The New Testament does not loosen monotheism by a thread: Jesus affirms the Shema as the greatest commandment, and Paul confesses one God, and one mediator between God and men. That is what makes the worship texts electric. The magi fall down and worship the child in Matthew 2; the disciples in the boat worship him after the storm is stilled; the women grasp his feet and worship him after the resurrection in Matthew 28. Matthew is a monotheistic Jew of the generation the exile cured of idolatry forever, recording men worshiping a man, and never once does he, or anyone in the narrative, object. The teachers press the backdoor argument: in a Bible where worship belongs to God alone, the narrator’s approving silence is itself a verdict. Either Scripture endorses idolatry, or the one being worshiped is God.

7. The explicit statements

   John, writing last and having pondered longest, opens where Matthew takes twenty-eight chapters to arrive: in the beginning was the Word, and the Word was with God, and the Word was God, the withness that distinguishes and the oneness that identifies, in a single verse. The same Gospel closes with Thomas’s hands in the wounds and his confession, my Lord and my God, unrebuked. Paul is explicit early and late: Romans 9 calls Christ God over all, blessed forever, and Colossians 1 makes him the image of the invisible God, creator of all things visible and invisible, before all things, and the one in whom all things hold together. Titus 2 awaits the appearing of our great God and Savior, Jesus Christ, where the Greek grammar, clarified in the nineteenth century by the Granville Sharp rule, binds God and Savior to one person, as it does again in 2 Peter. Even textual criticism testifies: the earliest manuscripts of John 1:18 read the only begotten God, a phrase so strong that later scribes appear to have softened it to Son. The teachers’ standing observation: the Trinity was articulated in the fourth century, but it was never invented there; this is where it comes from.

8. Jesus’ own claims, and the trilemma

   Jesus made the claim himself, in his own deliberate, unfolding way. Before Abraham was born, I am, he says in John 8, and they pick up stones, the penalty for blasphemy, not for claiming great age; and in John 10, I and the Father are one, draws the accusation in so many words: you, being a man, make yourself out to be God. In neither scene does Jesus correct the interpretation, and John, whose whole Gospel exists to show that Christ is God, lets both stand. The quotations seal it: the way prepared for the Lord in Matthew 3 is, in Isaiah 40, the way of Yahweh; and Romans 10, whoever calls on the name of the Lord will be saved, where the Lord can be no one but Jesus, is quoting Joel, where the name is Yahweh, the teachers’ favorite text to open with visitors at the door. Then the implicit claims, stacked until they topple every neutral reading: he blesses those persecuted for his sake, claims authority over the law, decides who enters the kingdom, foresees many saying Lord, Lord and answers I never knew you, repays each person for what he has done, commands love for himself above father and mother, and speaks of his angels. C. S. Lewis drew the conclusion the teachers commend: a mere man who said such things would be a lunatic or worse; Jesus did not intend to leave open the option of a great moral teacher. Liar, lunatic, or Lord, and no fourth option, for every other claimant to deity in history has ended in catastrophe and stayed dead. This one rose.

9. The deity of the Holy Spirit

   A curious fact of church history opens the pneumatology: no major heresy has ever accepted the full deity of the Father and the Son as distinct persons and then denied the Spirit; where Christ’s deity falls, the Spirit’s falls with it, and where Christ’s stands, the Spirit’s follows. The biblical case is quieter than Christ’s but clear. The Spirit bears divine names, the Spirit of God two dozen times, and Holy, an adjective Scripture reserves for deity, more than ninety times: no prophet or king is ever simply called the Holy Moses or the Holy David. Jesus in John 14 promises another Helper, another of the same kind as himself, personal as he is personal, to be with the disciples forever, which would be no comfort at all if the Spirit were a force or Christ merely returning under a new name. Paul in 2 Corinthians 3 writes that the Lord is the Spirit. And in Acts 5 Peter tells Ananias he has lied to the Holy Spirit, and then, without a seam, that he has lied not to men but to God. The Spirit has intelligence, emotions, and a will, none of which a force possesses, and blasphemy against him is treated with a unique severity.

10. The humility of the Spirit

    Then the observation Patton flags as the most important thing he can say about the Spirit, offered with the caveat that the class must judge it: the reason Scripture gives the Spirit so little direct attention is the Spirit’s own deliberate hiddenness. As the Son humbled himself visibly in becoming man, the Spirit humbles himself invisibly, refusing recognition, speaking not of himself but of Christ, the least named, least pictured, least individualized person of the Godhead, without even a personal name to hold in the imagination. This is why, the teachers suggest, a ministry that sets out to center itself on the Spirit is working against the Spirit’s own stated mission; the Spirit’s work is to floodlight Christ. He is nonetheless fully God, fully a person, loving his people as fully as the Father does, and one of heaven’s surprises will be meeting him.

11. The three, distinguished and together

    The plurality texts of the New Testament refuse every modalist reading. The baptismal formula of Matthew 28 places disciples under the one name of the Father and of the Son and of the Holy Spirit; 1 Corinthians 12 distributes gifts, service, and workings among the same Spirit, the same Lord, the same God; the benediction of 2 Corinthians 13 blesses the church from all three. At Jesus’ own baptism the Son stands in the water, the Spirit descends, and the Father speaks from heaven, three at once, in one scene. In Gethsemane the Son prays, Father, if it is possible, let this cup pass, and at the transfiguration the voice says, this is my beloved Son, listen to him, sentences that become deceptions if the speaker and the addressed are one person talking to himself. Scripture will not permit the collapse of the persons any more than the multiplication of the God.

12. The problem passages

    The session closes on the four texts most often quoted against Christ’s deity, each with its answer. Firstborn of all creation, in Colossians 1: the Greek term denotes priority and preeminence, the rights of the firstborn heir, not first-created, and the very next verse makes him the creator of all things. Only begotten: the Greek monogenes derives not from the verb to beget but from the noun for kind or class, one of a kind, unique, which is why Scripture can call Isaac Abraham’s monogenes though Ishmael lived, and why modern translations of John 3:16 read one and only Son. The beginning of the creation of God, in Revelation 3: a title of power and dignity, the origin and source of creation, not its first item, which would confer no dignity at all. And the Father is greater than I, in John 14: greatness of position, not of being. A king is greater than his servant in office while their humanity is equal; in the incarnation and in the economy of the persons, the Father sends and the Son obeys, functional subordination as the last session defined it, while above the arch the three share the one essence, fully God, and fully equal.

1. The teachers warn against outsourced theology, answers received rather than reasoned, and note that the cults train their members in exactly that. Where in your own faith are you still relying on borrowed answers, and which text from this session will you work through until it is yours?

2. The worship argument turns on a narrator’s silence: Matthew records men worshiping Jesus and never objects. Practice making that backdoor case aloud, as if to a visitor at your door, and then the Romans 10 and Joel argument after it. Which lands with more force, and why?

3. If the Spirit’s own mission is to floodlight Christ, what would it look like for your prayer, worship, and speech about the Spirit to honor him in the way he has chosen to be honored?