Chapter 2 · Deep dive
Biblical Monotheism: The LORD Is One
The Shema, covenant loyalty, and the Christian confession of Jesus
The Christian confession begins inside Israel’s insistence that the LORD alone is God. Jesus affirms, rather than replaces, the Shema. We should understand that confession in its own setting before asking how the apostles speak of the Father and the Son.
The Hebrew word for “one” does not secretly contain a technical definition of the Trinity. The decisive issue is the identity of the one God and the ways the New Testament includes Jesus in His works and honor.
The one God who rescued Israel
Deuteronomy 4 recalls the voice from the fire and the rescue from Egypt. Israel has been shown that YHWH is God and there is no other. The confession is attached to history: the Lord loved the ancestors, rescued their descendants, and gave His commandments. It demands obedience, not simply correct arithmetic about the number of gods.
Deuteronomy 6 makes that loyalty everyday and comprehensive. Israel is to love YHWH with heart, soul, and strength, speak His words at home and on the road, and teach them to children. The surrounding warnings concern forgetting the deliverer and following the gods of neighboring peoples. Deuteronomy 32:39 extends the claim to life and death: none can rescue from His hand. God’s uniqueness is inseparable from His authority and saving faithfulness.
Scholars debate how best to describe the stages of Israel’s historical religious practice. The canonical texts themselves often portray Israel worshiping other gods and being rebuked for it. We need not claim every Israelite always practiced consistent monotheism to acknowledge the theological demand of the Scriptures we are reading. The story records both the confession and the failures that make it necessary.
What does the Shema say?
Read the Hebrew confession
שְׁמַע יִשְׂרָאֵל יְהוָה אֱלֹהֵינוּ יְהוָה אֶחָד Shema Yisrael, YHWH Eloheinu, YHWH echad — Hear, Israel: YHWH our God, YHWH is one / YHWH alone
Biblical Hebrew can omit the present-tense verb “is.” The sequence allows discussion of how to connect its nouns and adjective. English renderings include “The LORD our God, the LORD is one” and “The LORD is our God, the LORD alone.” Neither should be treated as a hidden technical account of divine persons.
“Hear” asks for receptive obedience. “Our God” names covenant relationship. “One” or “alone” expresses the uniqueness and exclusivity of the LORD. The familiar translation emphasizes God’s oneness; the alternative highlights Israel’s exclusive allegiance. Their emphases need not be enemies: the surrounding command to love this God and reject other gods supports both His uniqueness and Israel’s undivided loyalty.
Why echad is not a shortcut
אֶחָד echad — one, a single one; usage depends on the phrase
The same ordinary word can describe one day, one person, or several people becoming one in a specified respect. Genesis 2:24’s “one flesh” does not make “compound unity” the dictionary meaning of every occurrence. Equally, Deuteronomy 6:4 does not by that word alone settle whether personal distinction can exist within the one God.
A plural noun beside “one” is not a coded Trinity argument either. Eloheinu, “our God,” belongs to the ordinary Hebrew language for Israel’s God. Agreement, context, and the whole confession determine its sense. The doctrine must be argued from the fuller canonical testimony, not from a claim that Moses placed a technical Trinitarian formula in an adjective.
Sources and further reading
- Deuteronomy 6:4 — NET translation and textual notes ↗
Compare the translation options and the discussion of the verbless Hebrew clause.
No other God: Isaiah’s universal claim
Isaiah contrasts the God who declares and acts with idols that must be manufactured and carried. In Isaiah 43 no god was formed before Him or will be afterward. Isaiah 44 calls Him the first and the last. Isaiah 45’s claim accompanies the unexpected use of Cyrus: the Lord governs history beyond Israel’s borders and calls all earth’s ends to turn to Him and be saved.
The universal bowing in Isaiah 45:23 is especially important. It belongs to the only righteous God and Savior, not to an independent rival. When Philippians takes up that language for Jesus, the question becomes how Jesus can receive this honor without displacing the Father. The Christian answer is not that Isaiah exaggerated God’s uniqueness; it is that the Son shares the identity of this one God. Zechariah’s vision of the LORD as king over all the earth similarly extends one worship and one name beyond local boundaries.
Jesus affirms the confession
Jesus begins His answer about the greatest commandment with the Shema and links love of God with love of neighbor. He does not announce that Israel’s God has been replaced by a new divine pair. His teaching binds Christian worship to the confession of the one Lord.
In 1 Corinthians 8 Paul also rejects the reality of idols as gods in the ultimate sense. He then speaks of one God, the Father, from whom are all things, and one Lord, Jesus Christ, through whom are all things. Many scholars understand this as a Christological rereading of the Shema: its God-and-Lord language is expressed through Father and Son. Others stress Jewish wisdom and agency traditions. The exact reconstruction of Paul’s technique is debated; the text’s inclusion of Jesus in the creation of all things is not dependent on that reconstruction.
Nicene theology therefore does not infer three gods from three persons. It understands the Father and Son named in the apostolic confession as belonging to the same divine life, with the Spirit included by the wider testimony. Monotheism supplies the boundary within which the evidence must be understood.
Key takeaways
- The Shema demands exclusive allegiance to the one LORD.
- Echad neither proves nor disproves the Trinity by itself.
- Jesus’ divine honor must be interpreted within, not against, biblical monotheism.