Introduction: Why This Matters
We live in a world drunk on spiritual confusion. Truth is no longer absolute. Gods are multiplied. Idols are updated. People bow to the universe, crystals, money, fame, themselves—even to nothing at all. The world says, “All paths lead to the same god,” while inventing new ones by the day.
But into that fog of man-made religion and blurred identity, the Bible thunders with unmatched authority:
Deuteronomy 6:4-5
Hear, O Israel: The LORD our God is one LORD: 5 And thou shalt love the LORD thy God with all thine heart, and with all thy soul, and with all thy might.
This verse is more than a memory verse. It is a war cry. It separates the true and living God from every counterfeit. It tears down the altars of false doctrine and demands exclusive allegiance to the God of the Bible. This isn’t ancient Jewish tradition—it’s Christian doctrine, eternal truth, and the foundation of everything we believe.
Without this doctrine—that God is one—every other truth falls apart. How can salvation be trusted if God is divided? How can judgment be righteous if authority is split? How can Scripture be true if God is confused?
Imagine building a house on a foundation made of shifting sand, each block shaped by a different belief, god, or power. That’s what false religion does. But the Christian builds on a Rock—one God, unchanging, undivided, and eternal.
And the right response to this truth is not cold theology—it’s wholehearted love:
“…thou shalt love the LORD thy God with all thine heart, and with all thy soul, and with all thy might.”
The one true God doesn’t just demand acknowledgment—He deserves your total affection, absolute worship, and undivided heart.
This is why we study this doctrine. Not to win arguments—but to worship rightly. This is the Doctrine of God. The Lord our God is One. Never forget that. People will try to twist this truth on you. Do not let them. Our God is one God.
I. The Declaration of God’s Oneness
Now that we’ve heard the foundational cry, “The LORD our God is one LORD,” we move from confession to confirmation. The Bible doesn’t whisper this truth (it’s definitely not hidden)—it declares it, repeatedly and without apology.
God Himself speaks. And when He does, there is no ambiguity. God’s words are crystal clear.
Isaiah 44:6
Thus saith the LORD the King of Israel, and his redeemer the LORD of hosts; I am the first, and I am the last; and beside me there is no God.
He didn’t say He’s the greatest among many gods. He didn’t claim to be the preferred deity. He said what no false god can truthfully say:
“Beside me there is no God.”
That is either absolute truth—or the boldest lie ever told. And every Christian must decide: do we believe Him or not? Again, God says: “Beside ME there is NO GOD.”
Isaiah 45:5
I am the LORD, and there is none else, there is no God beside me: I girded thee, though thou hast not known me.
He is not one among many. He is the only One, known or unknown, worshipped or rejected. His existence does not depend on human recognition.
Think of a lighthouse on a stormy sea. That lighthouse doesn’t argue with the waves or wait for the ships to approve of its location. The lighthouse just stands there. The sailor’s survival depends on trusting what is there, not what he feels is there. Likewise, God’s oneness is not based on consensus—it is eternally true, and your soul depends on recognizing God is one.
It doesn’t matter what the men and women of this world say or feel about God. He is what he is.
In a world where people think every belief is okay and all religions are equal, the God of the Bible slams the door shut on every competing claim. He says there is no other. All the false religions say there are more.
There is no need to search the world’s religions hoping to find a sliver of light.
There is no need to invent new spiritual paths to reach the divine.
There is no need to ascend through effort or enlightenment.
God did not wait for us to find Him. He declared Himself. He girded us, even when we didn’t know Him. He took the first step. The truth isn’t hidden—it’s revealed. God made this clear and public.
The doctrine of God’s oneness is not a theological ornament—it is the spine of Scripture. Break this truth, and the whole body of doctrine collapses. The Lord our God is one God.
II. The Oneness of God Across All Scripture
The Bible is not inconsistent or confusing. From the first page of Genesis to the last chapter of Revelation, it speaks with one voice: God is One. This isn’t just a detail—it’s the foundation of everything else in the Christian faith.
A. The Old Testament Proclaims It
God made Himself known to His people—not just by what He did, but by who He is. His mighty works were meant to reveal His identity.
Deuteronomy 4:35
Unto thee it was shewed, that thou mightest know that the LORD he is God; there is none else beside him.
God parted the Red Sea, fed them with manna, and thundered from Mount Sinai—not so Israel would just see His power, but so they would know that there is no other God.
Isaiah 45:21-22
Tell ye, and bring them near; yea, let them take counsel together: who hath declared this from ancient time? who hath told it from that time? have not I the LORD? and there is no God else beside me; a just God and a Saviour; there is none beside me. 22 Look unto me, and be ye saved, all the ends of the earth: for I am God, and there is none else.
God didn’t just speak to Israel. He called to all the ends of the earth—to every nation, every person. He alone is God. He alone is Saviour. There is no backup plan, no equal, and no alternative.
The world may invent gods, carve idols, and worship ancestors—but there is none else beside Him. No one else can save.
B. The New Testament Confirms It
When Jesus came, He didn’t change this truth—He repeated it. The apostles didn’t soften the message—they made it even clearer.
Mark 12:29
And Jesus answered him, The first of all the commandments is, Hear, O Israel; The Lord our God is one Lord.
Jesus quoted the same verse from Deuteronomy. That was still the first and greatest commandment. Nothing had changed.
1 Corinthians 8:4
As concerning therefore the eating of those things that are offered in sacrifice unto idols, we know that an idol is nothing in the world, and that there is none other God but one.
Paul didn’t leave room for opinion or culture. Idols are nothing. Other gods are fake. There is none other God but one.
Ephesians 4:6
One God and Father of all, who is above all, and through all, and in you all.
Paul didn’t say this to unbelievers—he said it to saved people. He reminded them that there is one God—above all, through all, and in all who believe.
The Old Testament taught this truth. Jesus affirmed it. The apostles preached it. And we still believe it today.
III. What This Truth Means for Us
The oneness of God isn’t just a theological idea to debate in a classroom. It affects everything about how we live, worship, and understand God. If there is only one true God, then we owe Him our full devotion—and we must reject everything that tries to compete with Him.
A. One God Means No Divided Allegiance
We are not free to split our worship. God doesn’t want part of your heart. He wants—and commands—all of it.
Exodus 20:3
Thou shalt have no other gods before me.
This was the first commandment God gave when He wrote with His own finger. And He didn’t say, “Make Me first.” He said, “Have no other gods at all.” That includes gods of wealth, popularity, lust, comfort, success, and even self.
You can’t blend Christianity with astrology. You can’t follow Jesus and your horoscope. You can’t pray to the living God on Sunday and live like an atheist Monday through Saturday.
One God means one throne—and He’s the only One who belongs on it.
Matthew 6:24
No man can serve two masters: for either he will hate the one, and love the other; or else he will hold to the one, and despise the other. Ye cannot serve God and mammon.
Jesus made it clear. You can’t split your loyalty. If you try to serve two masters, one will always win—and it won’t be God.
B. One God Means Unity in Essence
The oneness of God also means He is not divided within Himself. He isn’t a mixture of good and evil. He isn’t changing His mind or battling internally. He is perfect, whole, and unchanging.
Unity means oneness, not division or separation. Essence means what something truly is—its nature, being, or substance. When we say unity in essence, we are saying: “God is not made up of different parts or separate beings. He is perfectly unified in His nature.
We are not saying God is just one person as that denies the Trinity. We aren’t saying God is a mixture of different gods combined. We are not saying God has multiple personalities in conflict with each other. He doesn’t.
1 Corinthians 14:33
For God is not the author of confusion, but of peace, as in all churches of the saints.
God is whole, complete, and unchanging. God is not at conflict within Himself. The Father, Son, and Holy Ghost are three persons, but they all share the same divine essence. God is NEVER divided in will, character, or purpose.
God is not chaotic. He is not the source of spiritual confusion. If there’s confusion in doctrine, in worship, or in belief—it didn’t come from God.
He is one. His truth is one. His will is one. And as His people, we should reflect that same unity.
Malachi 3:6
For I am the LORD, I change not; therefore ye sons of Jacob are not consumed.
Because God is one and unchanging, He can be trusted. He does not contradict Himself. He does not evolve with culture. He is always the same. We don’t serve a God who argues with Himself. He doesn’t change based on mood, generation, or culture. We don’t have to guess what God is like—He is steady and always the same.
This is the God we worship: undivided, unconfused, and unchanging. That’s why we can stand on His Word and trust Him fully.
IV. One God in Three Persons (The Trinity)
Some people get confused or even intimidated by the word “Trinity.” But it’s not a made-up idea—it’s a Bible truth. Let’s teach it clearly and let Scripture do the talking.
The Bible teaches that there is only one God, but that one God exists in three distinct persons:
- The Father
- The Son (Jesus Christ)
- The Holy Ghost
Each one is called God. Each one is eternal. And yet—there are not three Gods. There is one God.
1 John 5:7
For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one.
This verse is simple but powerful. The Father, the Word (that’s Jesus—see John 1:1), and the Holy Ghost are three, but they are one. They are not separate beings working together—they are one divine essence.
This is not polytheism. We are not saying there are three Gods who get along. This is not modalism. We are not saying God just shows up in different forms. This is one God in three persons—eternal, equal, and united.
We also see this truth repeated at the end of Jesus’ earthly ministry when He gave the Great Commission.
Matthew 28:19
Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost.
Notice: It says “in the name”—not names. One name. One God. But also notice the clear distinction: Father, Son, Holy Ghost. “In the name of” means with the authority of the ONE GOD. In the power of the ONE GOD. By the recognition of the ONE GOD who is the Father, the Son, and the Holy Ghost.
He didn’t say “names”—because He wasn’t listing three separate deities with separate authorities. He said “name” (singular) because the authority, identity, and essence of God is one, even though He is revealed in three persons.
Think of it this way: If a police officer says, “Stop in the name of the law,” he’s not talking about one specific law—he’s talking about the full authority of the law behind him.
In the same way, “in the name of the Father, and of the Son, and of the Holy Ghost” means:
- With the full authority of the one true God.
- By the unified will and essence of all three persons.
- In recognition of God’s triune nature.
So yes—“in the name” points to:
- One name (one God)
- Three persons (Father, Son, Holy Ghost)
- Total authority and power behind it
Jesus, the Son of God, didn’t say to baptize in just the Father’s name. He didn’t say to baptize only in the name of Jesus. He gave all three persons—because all three are God. The name of is with respect to the full authority of the one true God.
This is why we pray to the Father, through the Son, in the Holy Ghost. It’s why Jesus said, “I and my Father are one”—not meaning they’re the same person, but that they are united in nature and purpose.
So how do we understand this?
We may not fully grasp how one God exists in three persons—but we don’t have to explain it away or reject it. We just believe it because the Bible says it.
God is not like us. He is greater. His nature is perfect. His persons are distinct. But He is still ONE.
And that’s what makes the Trinity so powerful:
- The Father sent the Son.
- The Son paid the price.
- The Holy Ghost lives in us.
Three persons. One plan. One God.
V. God Has No Rivals
When we say “God is one,” we don’t just mean that no other real gods exist—we mean that He stands alone without any competition. No one compares. No one threatens Him. No one can rival His glory.
You don’t need to fear other powers, false religions, or evil spirits. God is above them all.
Isaiah 40:25
To whom then will ye liken me, or shall I be equal? saith the Holy One.
That’s not just a question—it’s a statement. God is saying: there is no one like Me. No one even comes close. He’s not looking for rivals. He’s exposing the truth: there are none.
Some people talk like Satan is God’s opposite—but that’s false. Satan is a created being. He can’t do anything unless God allows it. He’s on a leash. Even the demons tremble at God’s name.
Man-made gods—idols of wood, stone, culture, or imagination—can’t speak, can’t move, and can’t save. They fall over and must be carried. But God never falls. He carries us.
Isaiah 44:8
Fear ye not, neither be afraid: have not I told thee from that time, and have declared it? ye are even my witnesses. Is there a God beside me? yea, there is no God; I know not any.
Think about that: God—who knows all things—says, “I don’t know of any other gods.”
That settles it. He’s not one of many. He’s the only one.
This truth gives us peace, boldness, and confidence. If God is for us, who can be against us? Because there is no rival throne. That’s great news for us.
VI. False Teachings That Deny This Doctrine
When truth stands tall, error must be exposed. God calls us not only to believe sound doctrine—but to refuse false doctrine. And when it comes to who God is, there are many dangerous lies that try to distort His nature.
A. Polytheism — Many gods
From ancient paganism to modern Hinduism and Mormonism, the idea of multiple gods directly contradicts everything God has said about Himself.
The Bible is not open to interpretation on this point. It’s not a gray area. There is one God, and there is none else.
Anyone who teaches otherwise—no matter how spiritual they seem—is preaching a lie.
B. Modalism — One Person, Three Roles
Modalism teaches that God is just one person who shows up in different forms—sometimes as the Father, other times as the Son, or the Spirit. But that’s not what the Bible teaches.
At Jesus’ baptism, we see all three persons at the same time:
- The Son is being baptized in the water.
- The Spirit descends like a dove.
- The Father speaks from heaven.
That’s not one person wearing three hats. That’s three persons acting together. Modalism denies the relationships within the Godhead and reduces God to a shape-shifter. That is not the God of Scripture.
C. Denying the Deity of Jesus or the Holy Ghost
Groups like the Jehovah’s Witnesses deny that Jesus is God and reject the Holy Spirit as a person. But the Bible calls this what it is: antichrist doctrine. Judaism denies Jesus the Son of God.
1 John 2:22
Who is a liar but he that denieth that Jesus is the Christ? He is antichrist, that denieth the Father and the Son.
You cannot deny Jesus as God and still claim to worship the true God. If you deny the Son—you don’t have the Father. And if you reject the Holy Ghost—you are rejecting the Spirit of truth.
Every one of these false teachings is deadly. They don’t just mislead—they destroy the foundation of who God is. That’s why this doctrine must be taught, defended, and held fast without apology.
VII. Application: Why It Matters Today
This isn’t just doctrine for the mind—it’s truth for the heart. What you believe about God affects everything in your life. If you get this wrong, everything else will be off. But if you get this right, it will shape your worship, your loyalty, and your love for Him.
If God is One, then:
• He Alone Deserves Our Worship
You weren’t made to divide your heart between God and anything else. He doesn’t share glory, and He doesn’t compete for second place.
Isaiah 42:8
I am the LORD: that is my name: and my glory will I not give to another, neither my praise to graven images.
You don’t need saints, angels, charms, or rituals to get close to God. You need Him—and Him alone.
• We Must Reject Every False God
When we say “God is One,” we’re also saying that every other so-called god is false. That includes the idols of other religions, the gods of this world, and the idols of the heart.
1 Corinthians 10:20-21
But I say, that the things which the Gentiles sacrifice, they sacrifice to devils, and not to God: and I would not that ye should have fellowship with devils. 21 Ye cannot drink the cup of the Lord, and the cup of devils: ye cannot be partakers of the Lord’s table, and of the table of devils.
There is no neutral ground. There is no shared table. God demands all of you, and He will not be mixed with error.
• He Must Be Everything to You
Not just your Sunday routine—not just your “faith”—but your life. The truth that “God is One” calls you to love Him with all your heart, all your soul, and all your might.
Deuteronomy 6:5
And thou shalt love the LORD thy God with all thine heart, and with all thy soul, and with all thy might.
Half-hearted Christianity is a contradiction. If God is One, then He must be your one desire, your one pursuit, and your one Lord.
• All We Do Must Be Directed to Him Alone
Going through the motions means nothing if it’s not centered on the true and living God.
John 4:23-24
But the hour cometh, and now is, when the true worshippers shall worship the Father in spirit and in truth: for the Father seeketh such to worship him. 24 God is a Spirit: and they that worship him must worship him in spirit and in truth.
God isn’t looking for fake religion. He’s seeking real worshippers—people who mean it, believe it, and live it.
If God is One, then we don’t belong to ourselves. We belong to Him. Let your prayers, your worship, your obedience, and your entire life be built on this unshakable truth:
The LORD our God is one LORD—and there is none else.
Let’s live like it. Let’s preach it boldly. Let’s love Him with everything we’ve got.
VIII. Final Declaration
Deuteronomy 6:4
Hear, O Israel: The LORD our God is one LORD.
That’s not a whisper. That’s a shout. It’s the banner over heaven. It’s the confession of every true believer. It’s the cornerstone of Christian theology.
We don’t believe in a god of our own making. We don’t serve a god of this world. We worship the One True God:
The LORD our God is ONE.
Let’s pray.
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