Guest Blog Post

Showcase - Cornerstone Fountain Valley | Karl Vaters | Live - July 19th, 2026

Cornerstone Fountain Valley

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This guest blog post draws directly from the sermon “Showcase - Cornerstone Fountain Valley | Karl Vaters | Live - July 19th, 2026” so you can keep engaging with the message all week. Read, reflect, and share it with your small group or friends.

Was Jesus Just a Good Teacher? Why the Answer Changes Everything

Meta Description: Pastor [Name] unpacked one of the Bible's most challenging passages to show why what we believe about Jesus isn't a minor detail—it's everything. URL Slug: was-jesus-just-a-good-teacher-why-the-answer-changes-everything Featured Image: An open Bible with a magnifying glass resting on the page, warm natural lighting, suggesting careful study and discovery — or a close-up of a worn Bible open to 1 John, with soft bokeh background.


Some Sunday mornings you walk away with a gentle encouragement. And then there are Sundays like this one — where you walk away with your understanding of Jesus permanently sharpened.

This week, Pastor [Name] tackled one of the most unusual passages in the entire New Testament, a section he openly admitted even his fellow pastors had given him a knowing look about when they saw it on the schedule. But that's exactly the kind of teaching that makes going through entire books of the Bible so valuable. You encounter passages you'd never choose on your own — and you discover they have something urgent to say.


Meet the Man Behind the Letter

Before diving into the text, Pastor [Name] took us on a brief but fascinating piece of Bible detective work, and it completely reframed how we hear the message.

First John was written by the apostle John — the same John who wrote the Gospel of John, Second and Third John, and the book of Revelation. That's five books of the New Testament from a single author. But who was he, exactly?

Using three parallel accounts of the crucifixion from Matthew, Mark, and John himself, Pastor [Name] walked us through a careful comparison of the women present at the cross. Matthew identifies "the mother of Zebedee's sons." Mark names her as Salome. John describes her simply as "his mother's sister." Put those three together, and the conclusion is remarkable: John was Jesus' first cousin.

They grew up together. John was part of Jesus' inner circle of three disciples — Peter, James, and John — present at the Transfiguration and in the garden of Gethsemane. He was the only disciple who didn't abandon Jesus at the cross. And in one of the most tender moments in all of Scripture, Jesus looked down from the cross and entrusted his own mother to John's care:

"When Jesus saw his mother and the disciple whom he loved standing nearby, he said to his mother, 'Woman, behold your son.' And then he said to the disciple, 'Behold your mother.' And from that hour the disciple took her to his own home." — John 19:26–27

As Pastor [Name] put it, John came to the cross with one mother and left with two. And for the rest of his life, he kept that promise. He spent his final years caring for Mary — hearing her stories, sitting with her memories of Jesus.

"If that's all you know about John," Pastor [Name] said, "that's enough. That's amazing."

Knowing who wrote this letter makes everything that follows carry far more weight.


A Strange Passage With a Specific Problem

The passage at the center of Sunday's message is 1 John 5:6–12. Read on its own, it can feel puzzling:

"This is the one who came by water and blood — Jesus Christ. He did not come by water only, but by water and blood. And it is the Spirit who testifies, because the Spirit is truth. For there are three that testify: the Spirit, the water, and the blood; and the three are in agreement." — 1 John 5:6–8

Water, blood, and Spirit — is this just another way of saying Father, Son, and Holy Spirit? Pastor [Name] was clear: it's not. Something much more specific is happening here, and understanding it requires stepping into the world of first-century Christianity.

By the time John wrote this letter — likely in the late AD 90s, some 60 years after the resurrection — Christianity had moved into its second and third generation. The church was no longer made up primarily of Jewish believers wrestling with the relationship between the Old Testament and the new covenant. Now, the majority of believers were coming out of Greek and Roman culture, shaped by a very different set of assumptions about reality.

One of the dominant philosophies of that world was Gnosticism — from the Greek word for knowledge. Gnostics believed that the spirit and the physical world were completely separate. Spirit was good. Matter was, at best, neutral — at worst, evil. And they could never mix.

This created a serious problem when Gnostic-influenced thinkers tried to make sense of Jesus. Their solution? Jesus must have been born an ordinary human, and only became divine at his baptism — by water. The idea that God himself could take on human flesh, be born, and die on a Roman cross was simply incompatible with their worldview.


John's Eyewitness Rebuttal

This is where the identity of the author becomes everything.

By the time these ideas were gaining traction in the church, nearly every eyewitness to Jesus' life and ministry was gone. Every disciple had died. Except one. And that one — the youngest, the last surviving member of the inner circle, the man who had known Jesus since childhood — stepped forward and said: I was there. And that's not what happened.

John's declaration in verse 6 is direct and deliberate: Jesus "did not come by water only, but by water and blood." He wasn't a man who became God at his baptism. He was God from the very beginning. This is the same John who opened his Gospel not with a birth narrative, but with a cosmic declaration:

"In the beginning was the Word, and the Word was with God, and the Word was God. He was with God in the beginning. Through him all things were made; without him nothing was made that has been made." — John 1:1–3

And then John connects this truth directly to what's at stake for every reader:

"Whoever believes in the Son of God accepts this testimony. Whoever does not believe God has made him out to be a liar, because they have not believed the testimony God has given about his Son." — 1 John 5:10

This, Pastor [Name] reminded us, is not a secondary issue. It is the core.


The Gospel Only Works One Way

Pastor [Name] brought the message home with a point that landed hard: the ancient arguments haven't disappeared. They've just been repackaged. Today, you'll still hear smart, thoughtful people suggest that Jesus was a great moral teacher, a spiritually enlightened figure, or someone in whom "the divine spark" was especially present — and that the same spark lives in all of us.

He quoted C.S. Lewis from Mere Christianity to cut through that comfortable middle ground:

"The really foolish thing that people often say about Jesus is, 'I'm ready to accept Jesus as a great moral teacher, but I don't accept his claim to be God.' That is the one thing we must not say. A man who was merely a man and said the sort of things Jesus said would not be a great moral teacher. He would either be a lunatic — on the level with the man who says he is a poached egg — or else he would be the Devil of Hell. You must make your choice."

Jesus left no comfortable middle option. He is Lord, or he is a liar, or he is a lunatic. There is no fourth door.

And the reason it matters so deeply is captured in the final two verses of the passage:

"And this is the testimony: God has given us eternal life, and this life is in his Son. Whoever has the Son has life; whoever does not have the Son of God does not have life." — 1 John 5:11–12

The gospel, as Pastor [Name] explained it, is not a philosophy or a self-improvement framework. It's news — the retelling of real events. God made us. We broke our relationship with him through sin. We could not restore it on our own. So God himself came, in the person of Jesus of Nazareth, paid the penalty for our sin on the cross, and rose from the dead — proving and promising that through him, we too can have eternal life.

That gospel only works if Jesus is who John says he is: the pre-existent, all-creating God who took on flesh. Not a man who became divine. Not a wise teacher who inspired us. The one through whom all things were made, who came to make all things new.


What We're Taking With Us This Week

Pastor [Name]'s willingness to dig into a difficult, easily-skipped passage gave us something we didn't know we needed: a clearer, more confident foundation for what we believe about Jesus — and why it matters.

The identity of Jesus is not a theological technicality. It is the hinge on which everything turns. And having a man like John — the cousin, the eyewitness, the one who kept his promise to a grieving mother — step forward and say I know who he is gives that testimony extraordinary weight.

If you missed Sunday's message, we'd encourage you to watch the full sermon on our YouTube channel. And if something in this post stirred a question or a conversation you want to continue, we'd love for you to bring it to a small group or reach out to one of our pastors. These are exactly the kinds of conversations the church was made for.


Social Media Excerpt (Facebook/Instagram): What do you do with a Bible passage that seems strange at first glance? This Sunday, Pastor [Name] showed us that one of the most unusual passages in 1 John carries one of the most important truths in all of Scripture — and that the question of who Jesus really is changes absolutely everything. Catch the full recap at the link in bio. 🙏

Hashtags: #WhoIsJesus #FirstJohn #BibleTeaching #CornerstoneFaith #SundaySermon

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