Why Did Jesus Call the Father the Only True God?

Jesus prayed:

“And this is life eternal, that they might know thee the only true God, and Jesus Christ, whom thou hast sent.” (John 17:3)

People often quote that verse like it ends the whole discussion:

“See? The Father is the only true God. So Jesus can’t be God.”

That argument feels strong for one reason: it forces you to read John 17:3 in isolation.

But John 17 is not the beginning of John’s Gospel. It’s near the end. John has already spent sixteen chapters teaching you who Jesus is—and John expects you to read John 17 in the light of everything he has already written.

So the real question is:

Would John build his Gospel by calling Jesus “God,” then suddenly end it by implying Jesus is a false god?

No. That would make John contradict himself on purpose.

Let’s unpack what Jesus meant, using John’s own “built-in” explanations.

Jesus calls the Father “the only true God” in the context of eternal life (John 17:3).

1) “Only true God” is not an insult to the Son — it’s a rejection of idols

Start with the obvious point that people skip:

If the Father is truly God, what should Jesus say?

“That they may know You, the only false god”?
“That they may know You, one true god among many”?
Or “the only true God”?

Jesus is praising the Father for who He truly is.

“Only true God” is exclusive language aimed at false gods—idols, pagan deities, and pretenders—not at the Father’s own eternal Word and Spirit.

John’s world was packed with “gods.” The Bible constantly contrasts:

the living God
versus “gods” that cannot save, speak, or give life

So when Jesus calls the Father “the only true God,” He’s not denying the Son’s deity.

He’s denying every rival claim to deity outside the one God.

2) John already told you Jesus is God before you ever reach John 17

John opens his Gospel with a headline, not a footnote:

“In the beginning was the Word, and the Word was with God, and the Word was God.” (John 1:1)

Then John says this Word:

“All things were made by him; and without him was not any thing made that was made.” (John 1:3)

And:

“In him was life…” (John 1:4)

So according to John:

Jesus existed before creation
Jesus is the Creator (through whom all things were made)
Jesus is the source of life

Now ask the simplest question:

If there is only one true God, what kind of “God” is the Word in John 1:1?

He cannot be a false god—because John presents Him as the Creator and life-giver, which Scripture reserves for God alone.

That’s why reading John 17:3 as “the Father is God, therefore Jesus is not” crashes into John 1 immediately.

John is not confused. John is consistent.

John begins by calling the Word “God” (John 1:1).

3) John 17:3 is about eternal life — and Jesus is included in the source of that life

Look again at John 17:3:

“This is life eternal, that they might know thee… and Jesus Christ…”

Jesus doesn’t say eternal life is knowing the Father instead of Jesus.

He says eternal life is knowing:

the Father as the only true God
and Jesus Christ whom He sent

In John’s Gospel, knowing Jesus is not “bonus information.” It’s the only way to know God rightly:

“He that hath seen me hath seen the Father.” (John 14:9)

“No man cometh unto the Father, but by me.” (John 14:6)

So John 17:3 isn’t pushing Jesus away from God.

It’s placing Jesus right inside the definition of saving knowledge.

4) John 10 proves Jesus does what only the one true God does

Now we come to a passage that makes the “John 17:3 excludes Jesus” reading impossible.

Jesus says:

“My sheep hear my voice, and I know them, and they follow me:

And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of my hand.” (John 10:27–28)

That’s not small talk.

Jesus claims:

believers are His sheep
they hear His voice
He gives eternal life
no one can snatch them from His hand

Then He adds:

“My Father, which gave them me, is greater than all; and no man is able to pluck them out of my Father’s hand.

I and my Father are one.” (John 10:29–30)

Notice what Jesus did:

The sheep are in Jesus’ hand (John 10:28)
The sheep are also in the Father’s hand (John 10:29)
The reason both statements can be true is: “I and my Father are one” (John 10:30)

Then the Jews try to stone Him and say why:

“because that thou, being a man, makest thyself God.” (John 10:33)

They understood exactly what Jesus was claiming.

Why? Because the Old Testament says these exact things about YHWH.

5) The Old Testament says only YHWH can do what Jesus claims

Here is YHWH speaking:

“there is no god with me: I kill, and I make alive… neither is there any that can deliver out of my hand.” (Deuteronomy 32:39)

And again:

“there is none that can deliver out of my hand…” (Isaiah 43:13)

And the Psalm describes God’s people as:

“the people of his pasture, and the sheep of his hand.” (Psalm 95:7)

So in the Old Testament:

God’s people are the sheep of YHWH’s hand
none can deliver them out of YHWH’s hand
YHWH alone gives life and preserves

Then in John 10:

Jesus says the sheep are His
they hear His voice
they are secure in His hand
and He gives them eternal life

That is why the Jews called it blasphemy. They recognized the Old Testament language.

So here’s the unavoidable conclusion:

John 17:3 cannot mean “the Father is the only true God, therefore Jesus is not true God.”

Because John 10 presents Jesus doing what the only true God does.

Jesus and the Father describe the same unbreakable security (John 10:28–30).

6) So what does John 17:3 actually mean?

Here’s the clean explanation that fits John’s Gospel:

A) The Father is the only true God (against idols)

The Father is not one god among many.

He is the one true God—over and against all false gods.

B) The Father is not “only true God” in isolation from the Son

John’s Gospel shows the Son shares the Father’s divine works:

creation (John 1:3)
giving life (John 1:4; John 10:28)
preserving God’s sheep with the same unbreakable power (John 10:28–30)

C) John 17:3 is relational language inside Trinitarian reality

Jesus is praying to the Father as the incarnate Son—the one sent into the world (John 17:3).

He honors the Father as the true God, while the Gospel simultaneously teaches the Son shares the one divine nature and works.

So the verse is not “excluding Jesus.”

It’s excluding every false god outside the Father, Son, and Spirit.

That’s why the “gotcha” backfires: it relies on a reading John’s own Gospel will not allow.

7) The simplest answer you can use in a debate

If someone says, “John 17:3 proves Jesus isn’t God,” respond:

“John 17:3 calls the Father the only true God against idols. But John already says the Word was God (John 1:1) and shows Jesus doing what only YHWH does—giving eternal life and keeping the sheep in His hand (John 10:27–30; Deut 32:39). So John 17:3 doesn’t exclude Jesus. It excludes false gods.”

Go Deeper

Want more “verse weapon” passages explained clearly (John 17:3, “only God is good,” “no one has seen the Father,” etc.)?

👉 https://evidence-for-the-bible.com/resource-library/

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