Old Testament Foundations of the Trinity

Twice a day, the devout Jew of the first century recited the same words his ancestors had recited for centuries, and that the observant Jew recites still: “Hear, O Israel: the LORD our God, the LORD is one” (Deuteronomy 6:4). The Shema is not a footnote to Israel’s faith; it is its heartbeat. Against a world crowded with gods—Baal and Asherah, Marduk and Amun-Ra—Israel confessed one God, maker of heaven and earth, who tolerates no rivals. Any honest discussion of the Trinity and the Old Testament has to begin there, on Israel’s own ground, and refuse to leave it.

So the question of this essay must be put carefully, because it is easy to overclaim and easy to dismiss. Christians confess one God in three coequal, coeternal persons—Father, Son, and Holy Spirit—a doctrine articulated at Nicaea (325) and Constantinople (381), centuries after the Hebrew Scriptures were complete. Does the Old Testament teach that doctrine? No—and we should say so plainly. Ancient Israel was monotheistic, and no Israelite prophet ever set out a doctrine of three persons in one essence. The narrower, more defensible question is whether the Old Testament, on its own terms, presents the one God as richer and stranger than a bare mathematical unit—whether it leaves, within its fierce monotheism, a kind of unexplained plurality that the New Testament later names. The Christian claim is modest in form and large in consequence: the Trinity does not contradict the Old Testament; it answers questions the Old Testament itself raised.

Stating the Claim—and What It Is Not

The single most important move here is to refuse the proof-text. For centuries some Christians treated Genesis 1:26 (“Let us make man”) as if it simply proved the Trinity, the way an arithmetic problem yields a sum. That is bad method and bad apologetics; it convinces no one who knows Hebrew and embarrasses those who do. The category we need is the one Scripture uses of itself: progressive revelation. God’s self-disclosure unfolds over time, seed to flower. The suffering Messiah, the bodily resurrection, the inclusion of the Gentiles—each is foreshadowed in the older books, wrestled over within Judaism, and revealed fully only later. The author of Hebrews names the pattern exactly: God spoke “at many times and in many ways” to the fathers by the prophets, and “in these last days” by his Son.¹

On this view, the Old Testament gives us shadows, not statues—but shadows are cast by something. The claim is not that Moses taught Nicaea, nor that a careful Israelite reader should have deduced the Trinity. It is that the texts contain a strange grammar—a LORD who is sent by the LORD, a Word that creates, a Spirit who can be grieved—and that when the church confessed Father, Son, and Spirit, it was not importing a foreign idea but recognizing the face of a God whose plurality had been latent in Israel’s own Scriptures all along. We must also be careful, in making this case, not to caricature Judaism. Jewish readers who decline the Christian reading are not being obtuse; they are honoring the Shema, and their alternative readings of the individual texts are serious and often reasonable on their own terms. Charity requires that we meet them at full strength.

The Threads of Plurality

“Let us make”

At the climax of creation, God says, “Let us make man in our image, after our likeness” (Genesis 1:26)—and then, in the next breath, “God created man in his own image” (1:27, singular). The same plural recurs at Babel (“let us go down,” 11:7) and in Isaiah’s throne-room vision (“Who will go for us?” 6:8). Something in the grammar resists a flat singularity. We will weigh the standard explanations below; for now the point is only that the plural is genuinely there in the text, not invented by later readers.

The Angel of the LORD

The most arresting thread is the figure the Hebrew calls the mal’akh YHWH, the Angel (or Messenger) of the LORD. He appears to Hagar and she names the LORD who spoke to her (Genesis 16:13). He calls to Abraham from heaven and says, “you have not withheld your son… from me” (Genesis 22:12). He speaks to Moses from the burning bush, and the text says it was “the LORD” and “God” who called (Exodus 3:2–6). Of the angel who will lead Israel, God warns, “my name is in him” (Exodus 23:21). Jacob, after wrestling at Peniel, says, “I have seen God face to face” (Genesis 32:30); Manoah fears death because “we have seen God” (Judges 13:22). Again and again this figure speaks as the LORD, is identified as the LORD, and yet is somehow distinct from the LORD who sends him—identity and distinction held together in a single character.

A LORD sent by the LORD

Two further texts sharpen the point. In Genesis 19:24, “the LORD rained on Sodom and Gomorrah sulfur and fire from the LORD out of heaven”—a sentence in which the LORD on earth and the LORD in heaven sit side by side. In Psalm 110:1—the Old Testament verse the New Testament quotes most often—David writes, “The LORD says to my Lord: Sit at my right hand.” And in Zechariah, on one natural reading, the LORD of hosts says that the LORD of hosts has sent him (Zechariah 2:8–11)—though the sender/sent referent here is debated. None of these, alone, demands two persons. Together they form a pattern that the Old Testament never resolves and never disowns.

Word, Wisdom, and Spirit

Alongside the Angel, Israel’s Scriptures speak of God’s Word, Wisdom, and Spirit as more than poetic flourishes. “By the word of the LORD the heavens were made” (Psalm 33:6). In Proverbs 8, Wisdom speaks in the first person as having been with God “at the beginning of his work,” a master craftsman beside him at creation (8:22–31). The Spirit of God hovers over the waters (Genesis 1:2), and can be “grieved” and rebelled against (Isaiah 63:10), can instruct (Nehemiah 9:20), and in Isaiah 48:16 a speaker says the Lord GOD “and his Spirit” have sent him—the Spirit named alongside God, not merely wielded by him. None of this yet amounts to three persons. But it is more than metaphor strained to its limit; it is the canon repeatedly drawing distinctions within the one God.

The two figures of Daniel 7

The most striking scene is Daniel’s night vision. The “Ancient of Days” takes his throne, his clothing white as snow; then “one like a son of man” comes “with the clouds of heaven,” is presented before the Ancient of Days, and receives “dominion and glory and a kingdom, that all peoples, nations, and languages should serve him”—an everlasting dominion that shall not pass away (Daniel 7:9–14). Two details are often pressed—though each must be qualified at once. Riding the clouds is, throughout the Old Testament, an image elsewhere used of God.² But this is suggestive rather than decisive: many critical scholars (Collins among them) read the human-like figure as an exalted angelic representative, most likely Michael, rather than as a second divine person, and on that reading the figure need not be divine at all. The second detail is the universal, eternal “service” rendered to this figure—language the Hebrew Bible often reserves for God; yet the Aramaic verb here (pelach) can denote either religious worship or the service owed to a king, and which sense is intended is genuinely debated. So the most that can be said from the text alone is that the scene is strikingly suggestive: here are two figures in the one heavenly scene—one ancient and enthroned, one human-like and exalted to share the throne—and Daniel does not explain how a second figure comes to receive such universal, everlasting homage. He simply records the vision.

The Witness from Within Judaism

If these readings were merely Christian retrojections, we would expect Jewish interpreters, reading the same Hebrew without Christian motive, to find nothing strange. They did not. The decisive historical evidence is the rabbinic polemic against what the rabbis called “two powers in heaven” (shtei reshuyot ba-shamayim). In his landmark 1977 study, the Jewish scholar Alan F. Segal showed that “two powers” was an early and basic category of heresy by which the rabbis perceived dangerous interpreters—those who read Scripture to find a second divine figure beside the LORD.³ The crucial point is methodological: you do not legislate against an interpretation no one holds. The very existence of the controversy is evidence that the texts themselves—Daniel 7’s thrones (note the plural in 7:9), the Angel, the LORD-from-the-LORD passages—generated binitarian readings inside Judaism, before and apart from the church.

The Jewish historian Daniel Boyarin has pressed this further, arguing that a “binitarian” theology—belief in a second divine figure, often connected to God’s Logos or Wisdom—was, on his reading, widespread in the Judaism of Jesus’s day, and that the idea of a divine-human redeemer is itself a Jewish idea rooted in Daniel 7, not a later Gentile import.⁴ Boyarin’s claim is itself debated—Peter Schäfer and others judge it an overreading—but even his critics grant that the conceptual room for such readings existed. The ancient Aramaic Targums, paraphrasing the Scriptures for synagogue use, frequently put the Memra (“Word”) of the LORD where the Hebrew has the LORD himself—creating, saving, covenanting. And the Jewish philosopher Philo of Alexandria, a contemporary of Jesus, could call the divine Logos a “second God” (deuteros theos).⁵ The conceptual slots, in other words, predate Bethlehem. When the prologue of John’s Gospel announced that “the Word was God” and “the Word became flesh,” it did not invent the category; it claimed that a Jewish category, long open, had been filled by a particular man.

The Strongest Objection, at Full Strength

The best case against all of this is the Jewish and unitarian one, and it deserves to be stated without softening. It runs as follows.

First, the Shema. The Old Testament does not merely fail to teach the Trinity; it relentlessly teaches the opposite. “The LORD is one.” “I am the LORD, and there is no other” (Isaiah 45:5). “I am the first and I am the last; besides me there is no god” (Isaiah 44:6). Isaiah even insists that the LORD stretched out the heavens “alone” and spread out the earth “by myself” (44:24). On the most important fact about God, the canon hammers undifferentiated oneness on page after page. A doctrine of plurality smuggled into that polemic is not a discovery; it is a contradiction.

Second, the plurals dissolve on inspection. The standard scholarly options for Genesis 1:26 are well known and entirely natural within an ancient Near Eastern setting: it may be a plural of deliberation or self-address (a person musing, “let’s see”); a plural of majesty; or—most favored by many critical scholars—God addressing his heavenly court, the “sons of God” and angelic council attested across the Old Testament (1 Kings 22:19–22; Job 1:6; Psalm 82; Isaiah 6:8).⁶ On the divine-council reading, “let us make” is God speaking to his angelic attendants, exactly as a king addresses his court—and the very next verse, with its singular “God created,” shows that only God does the creating. No Trinity is needed or implied.

Third, the Angel is an envoy. In the ancient world, an emissary (Hebrew shaliach) spoke and acted in the full authority of the one who sent him; to receive the king’s messenger was to receive the king. That convention, not a hidden second person, explains why the Angel speaks as the LORD. And Wisdom in Proverbs 8 is plainly personified poetry—the same book personifies Folly as a woman (9:13) without anyone supposing a goddess of Folly. The honest verdict, the objector concludes, is that ancient Israel was a monotheistic culture using the ordinary literary and diplomatic conventions of its world, and that reading three coequal persons out of it requires fourth-century spectacles. The silence is not an accident waiting to be filled; the silence is the doctrine.

The Reply—Conceding What Should Be Conceded

Much of this objection should simply be granted, and granting it strengthens rather than weakens the Christian case. Yes—the Old Testament is monotheistic, and any reading that turns the Shema into a confession of three gods has misread it catastrophically. Yes—the divine-council interpretation of Genesis 1:26 is a serious, perhaps the most defensible, reading of that single verse; the contemporary scholar Michael Heiser, who has done as much as anyone to revive the divine-council framework, takes “let us” as God’s address to his heavenly host and warns against using it as a Trinity proof-text.⁷ Yes—the envoy convention really does explain a great deal of the Angel’s speech, and Wisdom in Proverbs 8 really is, in its first sense, personification. If the case rested on any one of these threads, it would fail. It does not rest on any one of them.

The reply is a convergence argument, and convergence is the heart of it. Take the threads singly and each has an innocent explanation; the question is why the same shape keeps emerging from independent devices. The Angel, the Word, the Wisdom, the Name, the Glory, the Spirit, the second figure of Daniel 7—different vocabularies, different genres, different centuries—all keep generating one silhouette: something that is of God, with God, and acting as God, distinguishable from God yet never a second god. The envoy convention explains speech, but conventional envoys do not bear the divine Name within them—and of this figure God says, uniquely, “my name is in him” (Exodus 23:21)—and they do not prompt a man to say he has seen God’s face and lived. (That genuine angels refuse worship and redirect it to God is a pattern stated explicitly only later, in the New Testament—compare Revelation 19:10; 22:8–9—so it illustrates the contrast rather than serving as Old Testament evidence for it.) Personified Wisdom is poetry, but personified Folly never gets enthroned beside God at creation. When a tradition’s ordinary literary machinery repeatedly throws off the same theological figure—and when that tradition’s own later guardians have to mount a sustained polemic against “two powers” to suppress it—the figure has become data, not decoration.

And here the divine-council concession actually helps. For the council reading does not erase plurality from the Godhead; it relocates the question. Granting that “let us make” addresses the heavenly host still leaves Genesis 1:27 insisting that the image-bearing creation is God’s act alone, and still leaves Daniel 7’s human-like figure receiving the universal, everlasting service due to God—not a courtier among the host but one enthroned with the Ancient of Days. The strongest objection to one thread is not, in the end, an objection to the pattern the threads compose.

What the Pattern Will Not Bear

Honesty now requires marking the limits clearly, because this argument is unusually easy to push too far. First, several of these readings are genuinely contested, and the Jewish alternatives are not desperate. The divine-council reading of Genesis 1:26 is held by serious scholars and may well be the plain sense; the “plural of deliberation” reading is defended by Hebraists; and a critic such as the Australian philosopher Graham Oppy would rightly note that “the texts generated binitarian readings” is not the same as “the texts are best explained by a true Trinity.” That a community read a second power out of Daniel 7 shows the texts were suggestive, not that the suggestion was correct. This is a real limit, and we should not pretend otherwise.

Second, the early Christian use of these texts was sometimes theologically rougher than later orthodoxy. When Justin Martyr argued from the Angel and from Genesis 18–19 that there is “another God and Lord” beside the Maker of all, he framed that second figure as in some sense subordinate—language the church later judged inadequate and corrected at Nicaea, which confessed the Son as “true God from true God… of one being with the Father.”⁸ The Old Testament foundations point toward plurality-in-unity; they do not, by themselves, secure the coequality and coeternity that the creeds rightly insist on, and they certainly do not teach three gods (tritheism), or one person in three masks (modalism), or a lesser second god (subordinationism). Those refinements come from the fuller New Testament revelation read as a whole.

So the critic deserves the last word before the reply: the Christian, the objection runs, has shown only that the Old Testament is suggestive and that some ancient Jews found it so—which is a long way from showing that the suggestion is true, and the leap from “unexplained plurality” to “three coequal persons” is supplied entirely by the New Testament, not the Old. That is fair, and it should be conceded in full. The Old Testament foundation does not, on its own, get anyone to Nicaea. What it does is more limited and more important: it shows that the Trinitarian God is the kind of God Israel’s Scriptures were already describing—so that the Christian confession is the completion of Israel’s story rather than a betrayal of it. The doctrine is established on other grounds; the Old Testament shows it has deep and native roots.

The State of the Scholarship

The honest state of the field is more interesting than the popular debate suggests. The old battle—was Israel “really” monotheistic?—has matured. Scholars such as Richard Bauckham argue that Second Temple Judaism held a “strict” monotheism defined not by abstract numerical oneness but by the unique identity of the one God: the only Creator, the only sovereign, the only rightful recipient of worship.⁹ Larry Hurtado documented how the earliest Christians, themselves Jews, folded Jesus into precisely that divine identity—worshiping him alongside God in a “dyadic” or “binitarian” devotional pattern that erupts astonishingly early.¹⁰ On the Jewish side, Segal and Boyarin have shown that the conceptual room for a second divine figure existed within Judaism itself. There is real, ongoing disagreement—Bauckham and the “intermediary figures” school dispute how elastic Jewish monotheism was, and Jewish scholars who document “two powers” readings emphatically do not endorse them as true. But the crude picture—rigid Jewish unity on one side, a pagan-influenced Trinity invented centuries later on the other—has not survived the scholarship. The genuine live questions are narrower and sharper: how strict was Second Temple monotheism, how early and how Jewish was the worship of Jesus, and whether the Old Testament’s plurality is best read as a foreshadowing or as a literary feature exhausted by its ancient conventions.

Conclusion: Foundations, Not the House

What does the Old Testament establish about the Trinity? Less than the proof-texter wants, and more than the skeptic allows. It does not teach the doctrine of the Trinity; ancient Israel was monotheistic, the developed dogma is later, and the plurals and the Angel can each be read otherwise. Anyone who claims Genesis 1:26 “proves” three persons has overreached, and should stop. But the Old Testament does present the one God as internally rich and self-differentiated in ways that no merely human invention would have dared and that Israel never explained away—a LORD sent by the LORD, a Word and Wisdom and Spirit acting as God with God, a second figure enthroned in Daniel’s heaven—and it left those tensions live enough that Israel’s own interpreters had to argue about “two powers” long before any Christian creed.

The foundations are not the house. The Trinity is built on the full sweep of revelation, climaxing in the Son who could say “before Abraham was, I am,” and in the Spirit poured out at Pentecost. But foundations are not nothing. They are what tells you the house belongs on this ground and no other. The Christian says, with gentleness and respect to the Jewish neighbor who reads the same sacred page: we are not worshiping a different God, or three gods, or a God reinvented in Greek. We are worshiping the God of Abraham, Isaac, and Jacob—the one God of the Shema—whose name has now been spoken in full. Whether that fuller revelation is true is the argument that begins where this one ends. That it would have a home in Israel’s Scriptures is what this one shows.