Day 5: The Only True God, No Rivals
The Doctrine of God: Days 2-28
Scripture
“Hear, O Israel: The LORD our God, the LORD is one.” Deuteronomy 6:4 ESV
“You shall have no other gods before me.” Exodus 20:3 ESV
“Hear, O Israel: The LORD our God, the LORD is one.” Deuteronomy 6:4 ESV
“You shall have no other gods before me.” Exodus 20:3 ESV
Confessional Summary
The Reformed confessions begin where Scripture begins, with God Himself. The Belgic Confession opens by confessing that there is “one only simple and spiritual Being, which we call God,” and it describes Him as “eternal, incomprehensible, invisible, immutable, infinite, almighty, perfectly wise, just, good, and the overflowing fountain of all good” (Belgic Confession, Article 1).
Westminster says the same truth with clean force, “There is but one only, living, and true God” (Westminster Confession of Faith 2.1). The Larger Catechism presses it into the first commandment, that we must know and acknowledge God to be the only true God, and worship and glorify Him accordingly, and that we must have no other gods in His place (Westminster Larger Catechism 104–105).
The Reformers treated the oneness of God as a pastoral demand, not a classroom idea. One God means one rightful Lord of the whole heart, which is why repentance always includes turning from rivals, not just avoiding obvious idols.
The Reformed confessions begin where Scripture begins, with God Himself. The Belgic Confession opens by confessing that there is “one only simple and spiritual Being, which we call God,” and it describes Him as “eternal, incomprehensible, invisible, immutable, infinite, almighty, perfectly wise, just, good, and the overflowing fountain of all good” (Belgic Confession, Article 1).
Westminster says the same truth with clean force, “There is but one only, living, and true God” (Westminster Confession of Faith 2.1). The Larger Catechism presses it into the first commandment, that we must know and acknowledge God to be the only true God, and worship and glorify Him accordingly, and that we must have no other gods in His place (Westminster Larger Catechism 104–105).
The Reformers treated the oneness of God as a pastoral demand, not a classroom idea. One God means one rightful Lord of the whole heart, which is why repentance always includes turning from rivals, not just avoiding obvious idols.
Reflection
Monotheism is not mainly a math statement. It is a loyalty statement. “The LORD is one” means God is not one option among many, not a slice of your life, not a helpful addition to your plans. He is Creator, everything else is creation.
That is why the first commandment is so searching. Idolatry is not mainly bowing to statues. It is giving ultimate weight to something God made. It happens when a good thing becomes a god thing, when comfort becomes non-negotiable, when control becomes your refuge, when approval becomes your oxygen, when success becomes your identity, when nation or family or even ministry becomes the thing you cannot lose. The giveaway is what you fear losing most, what you protect at all costs, what you obey even when it contradicts God.
The first commandment is God’s kindness to you because rival gods always promise life and then take it. They demand sacrifice, and they punish you when you fail them. The living God gives Himself. He claims exclusive worship because He alone is life, and because He refuses to let you be owned by a counterfeit.
Monotheism is not mainly a math statement. It is a loyalty statement. “The LORD is one” means God is not one option among many, not a slice of your life, not a helpful addition to your plans. He is Creator, everything else is creation.
That is why the first commandment is so searching. Idolatry is not mainly bowing to statues. It is giving ultimate weight to something God made. It happens when a good thing becomes a god thing, when comfort becomes non-negotiable, when control becomes your refuge, when approval becomes your oxygen, when success becomes your identity, when nation or family or even ministry becomes the thing you cannot lose. The giveaway is what you fear losing most, what you protect at all costs, what you obey even when it contradicts God.
The first commandment is God’s kindness to you because rival gods always promise life and then take it. They demand sacrifice, and they punish you when you fail them. The living God gives Himself. He claims exclusive worship because He alone is life, and because He refuses to let you be owned by a counterfeit.
Application
Pay attention to what you fear losing most. That often reveals your functional god. Bring one specific rival into the light, without soft language or excuses. Then take one small act of obedience this week that costs that idol something and shows that God, not that rival, sits on the throne.
Prayer
Lord, You alone are God. Expose my rival loyalties and pull down my hidden altars. Bring my heart under your good rule and keep me there. Through Christ. Amen.
Pay attention to what you fear losing most. That often reveals your functional god. Bring one specific rival into the light, without soft language or excuses. Then take one small act of obedience this week that costs that idol something and shows that God, not that rival, sits on the throne.
Prayer
Lord, You alone are God. Expose my rival loyalties and pull down my hidden altars. Bring my heart under your good rule and keep me there. Through Christ. Amen.
Recent
Archive
2026
January
Day 1: Our Chief End, All of Life for God's GloryDay 2: The Doctrine of God, The God Who IsDay 3: God Is, The Living God Who Truly ExistsDay 4: God Speaks First, Knowing the Living GodDay 5: The Only True God, No RivalsDay 6: God is Spirit, Not Like UsDay 7: God Is Self-Existent, “I AM”Day 8: God Is Not Divided, His Perfections Do Not CompeteDay 9: God Is Holy, Not Safe, Not CommonDay 10: God Is Love, Not Indifferent, Not SentimentalDay 11: God Is Just, The Judge of All the EarthDay 12: God Is Merciful, He Delights to PardonDay 13: God Is Sovereign, None Can Stay His HandDay 14: God Is Wise, Never Confused, Never LateDay 15: God Is Good, He Does GoodDay 16: God Is True, He Cannot LieDay 17: God Is Eternal, Before All, After AllDay 18: God Is Unchanging, Your AnchorDay 19: God Is Omniscient, Fully Known by God, Fully Loved in ChristDay 20: God Is Omnipresent, Never AbsentDay 21: God Is Omnipotent, God Is AbleDay 22: The Trinity, One God in Three PersonsDay 23: The Father, Source, Sender, and AdopterDay 24: The Son Eternal God Redeeming LordDay 25: The Spirit, Lord, and Giver of LifeDay 26: God’s Grace and Decree: Salvation Begins with GodDay 27: Providence: The Fatherly Hand Over All ThingsDay 28: Worship, The Proper End of the Doctrine of GodDay 29: The Doctrine of Scripture, The God Who SpeaksDay 30: Revelation; General and SpecialDay 31: The Authority of Scripture
February
Day 32: Inspiration, God-Breathed and Given by the SpiritDay 33: The Authority of Scripture, The Line You Do Not CrossDay 34: Self-Authenticating Scripture, Recognizing the Word of GodDay 35: The Role of the Holy Spirit, Illumination Not InnovationDay 36: Inerrancy and Truthfulness, Truth Has a NameDay 37: The Sufficiency of Scripture, God’s Word is EnoughDay 38: The Clarity of Scripture, An Open DoorDay 39: The Canon of Scripture, A Settled WordDay 40: The Unity of Scripture, One Story, One SaviorDay 41: Preservation of Scripture, The Word Kept PureDay 42: Translation and Accessibility, The Word Made PlainDay 43: Scripture and Tradition, The Final Court of AppealDay 44: Scripture and the ChurchDay 45: Scripture and Worship, God Sets the TermsDay 46: Scripture and Preaching, God Speaks Through MeansDay 47: Scripture and ObedienceDay 48: Scripture and SanctificationDay 49: Scripture and Comfort, God Speaks PeaceDay 50: Scripture and Assurance, God Speaks CertaintyTaking a Pause
