The Biblical Case for the Trinity
Explore how Scripture reveals one God: eternally existing as Father, Son, and Holy Spirit.
1. God Is One
Scripture’s clear foundation: there is only one God
There Is Only One God
The biblical case begins here: there is one God, not many. This truth was foundational to Israel’s faith and was explicitly affirmed by Jesus.
- Deuteronomy 6:4
Hear, O Israel: The LORD our God, the LORD is one.
- Zechariah 14:9
And the LORD will be king over all the earth. On that day the LORD will be one and his name one.
- Mark 12:29
Jesus answered, “The most important is, ‘Hear, O Israel: The Lord our God, the Lord is one.’”
No God Besides Him
Scripture goes even further by saying that God alone is God. There is no other beside Him.
- Isaiah 43:10–11
“You are my witnesses,” declares the LORD… “Before me no god was formed, nor shall there be any after me. I, I am the LORD, and besides me there is no savior.”
- Isaiah 44:6
I am the first and I am the last; besides me there is no god.
- Isaiah 45:5
I am the LORD, and there is no other, besides me there is no God.
- Isaiah 46:9
Remember the former things of old; for I am God, and there is no other; I am God, and there is none like me.
- Nehemiah 9:6
You are the LORD, you alone. You have made heaven, the heaven of heavens, with all their host… and the host of heaven worships you.
One God in the New Testament
The New Testament holds firmly to the same foundation. There is one God, even as Jesus and the Holy Spirit come more clearly into view.
- 1 Corinthians 8:4
We know that “an idol has no real existence,” and that “there is no God but one.”
- 1 Timothy 2:5
For there is one God, and there is one mediator between God and men, the man Christ Jesus.
- James 2:19
You believe that God is one; you do well. Even the demons believe—and shudder!
