Understanding the Gospel of John: Purpose and Witnesses
Explore the unique theological themes, eyewitness testimony, and historical context of the Gospel of John in this comprehensive teaching session.
A Teaching Night
The Gospel of John
eyewitness · purpose · grace & truth
An Introduction to This Session
What Are We Talking About?
This session explores the Gospel of John — why John wrote what he wrote, what he chose to include and leave out, and the theological threads that run through his unique account.
The Through Lines of This Session
What shaped John's choices as a writer?
John's Purpose
Why he wrote, what he included, what he left out
Grace & Truth
The twin pillars running through his Gospel
The Witnesses
Who John calls on to build his case
John's Purpose
“These are written so that you may believe that Jesus is the Messiah, the Son of God, and that by believing you may have life in his name.”
— John 20:31
John tells us exactly why he wrote — belief and life. Every inclusion, every detail, serves this goal.
John writes as one who was there
First-Person Witnesses
John refers to himself as "the disciple whom Jesus loved" — a direct eyewitness throughout the Gospel.
Unlike other Gospel writers, John repeatedly anchors his account in personal witness: "He who saw it has borne witness — his testimony is true." (John 19:35)
Eyewitness testimony is not incidental to John — it is the foundation of his entire case.
Combating Gnostic Theologies
Why John insists on the physical reality of Jesus
Gnosticism taught that the physical world was evil — that Jesus only appeared to have a body (Docetism).
John pushes back hard: "The Word became flesh and dwelt among us." (John 1:14)
John's Gospel is full of physical, embodied details — water, bread, mud, tears, blood — grounding Jesus in real history.
John's Gospel is not just spiritual — it is stubbornly, deliberately physical.
Grace & Truth
John 1:14
The Word became flesh and made his dwelling among us... full of grace and truth.
Truth
John's Gospel makes truth a central, repeated claim.
Jesus declares <strong style="font-weight: 600;">“I am the way, the truth, and the life”</strong> (John 14:6) — truth is not abstract, it is a person.
John anchors his Gospel in <strong style="font-weight: 600;">eyewitness testimony</strong> precisely because truth matters: what happened, really happened.
Which brings us back to the witnesses…
Even Pilate asks: “What is truth?” — John 18:38
Truth?
What is Truth?
— Pontius Pilate, John 18:38
Pilate's question is one of the most haunting lines in all of Scripture — spoken to the one who is Truth himself.
John alone records this exchange. It is not accidental — it fits perfectly with John's emphasis on truth as a theme.
The irony: the man with the power to free Jesus cannot recognise or act on the truth standing before him.
Grace
A Redemptive Arc
John's Gospel is full of characters who move from doubt, failure, or darkness — toward restoration.
PETER · NICODEMUS · THOMAS · PILATE · MARY · JOHN
Peter
Denial → Restoration
The Denial
Peter denied Jesus three times by a charcoal fire.<br><br><em>“I am not his disciple.”</em><br><br><span style="font-size: 26px; font-family: 'Inter', sans-serif; color: #718096; font-style: normal;">(John 18:17, 25, 27)</span>
The Restoration
By another charcoal fire, Jesus asks Peter three times: <em>“Do you love me?”</em><br><br>and three times commissions him: <em>“Feed my sheep.”</em><br><br><span style="font-size: 26px; font-family: 'Inter', sans-serif; color: #718096; font-style: normal;">(John 21)</span>
John is the only Gospel to include this full restoration scene. The charcoal fire is not an accident.
Nicodemus
Secret Questions → Public Burial
PART ONE — IN THE SHADOWS
Nicodemus came to Jesus at night — secretly, not wanting to be seen. He was a Pharisee, a ruler of the Jews. (John 3:1-2)
PART TWO — IN THE OPEN
After the crucifixion, Nicodemus came publicly with 75 pounds of spices to embalm Jesus' body — a lavish, costly, and very public act of devotion. (John 19:39-40)
The man who came to Jesus at night ends up honouring him in broad daylight.
Thomas
Doubt <span style="font-family: 'Inter', sans-serif; font-style: normal; font-size: 0.8em; margin: 0 8px; vertical-align: middle;">→</span> Belief
The Doubt
Unless I see the nail marks in his hands and put my finger where the nails were, and put my hand into his side, I will not believe.
— John 20:25
The Confession
When Jesus appears and offers his hands, Thomas responds with the highest confession in the Gospel:
My Lord and my God!
— John 20:28
<strong>Thomas is not condemned for his doubt</strong> — he is met in it. His confession becomes the climax of the Gospel.
A More Complicated Portrait
Pilate
John gives more space and detail to Pilate's internal conflict than any other Gospel.
John alone records Pilate taking Jesus inside, questioning him privately, and repeatedly attempting to release him.
Pilate has Jesus flogged first — then brings him out to the crowd saying "Behold the man!" — hoping the display of suffering will be enough to satisfy them and allow Jesus' release.
Pilate ultimately fails Jesus — but John shows us a man genuinely wrestling with what to do.
Pilate's failure is not ignorance. He knew. He just chose the crowd.
A moment of care in the middle of agony
Mary & John at the Cross
John alone records that Jesus' mother stood at the foot of the cross — along with the Beloved Disciple.
In the midst of his suffering, Jesus arranges for her care:<br><span style="font-family: 'Playfair Display', serif; font-style: italic; color: #0a192f; display: block; margin-top: 12px; font-size: 34px;">"Woman, here is your son." / "Here is your mother." (John 19:26-27)</span>
From that moment, the disciple took her into his own home.
Even from the cross, Jesus is providing. This is grace — not just for the world, but for the woman in front of him.
The Last Words of Jesus
A tale of two endings
Matthew & Mark
My God, my God, why have you forsaken me?
— Matthew 27:46 / Mark 15:34
A cry of desolation. Raw, anguished, deeply human.
John
It is finished.
(Greek: tetelestai — "It is accomplished")
— John 19:30
A declaration of completion. Not defeat — victory. The mission is done.
Same cross. Same moment. Two very different final words — each true, each intentional.
The Witnesses
Who is John calling to the stand?
THE BELOVED DISCIPLE · THE SPEAR WITNESS · PILATE · P52 · PETER & MALCHUS
"A Scholarly Pattern"
"Anonymous doesn't mean unknown"
John's Gospel never names the author directly — he refers to himself only as "the disciple whom Jesus loved."
Some scholars have used this anonymity to argue the Gospel is late, composite, or unreliable.
But anonymity in ancient texts is often a sign of humility or cultural convention — not deception.
The early church unanimously attributed the Gospel to John, son of Zebedee, from very early on.
The absence of a name is not the absence of an author. John knew exactly what he was doing.
An eyewitness hiding in plain sight
The Other Disciple
Throughout John's Gospel, "the disciple whom Jesus loved" appears at key moments: the Last Supper, the trial, the cross, the empty tomb, the lakeside.
This is John's subtle way of signing his own work — present but not self-promoting.
At the cross, this disciple witnesses the spear wound: "He who saw it has borne witness, and his testimony is true." (John 19:35)
At the tomb, he sees and believes before anyone tells him what to think. (John 20:8)
The Beloved Disciple is not a literary device — he is a man who was there.
The Spear Witness
An unexpected verification of the death of Jesus
John alone records that a soldier pierced Jesus' side with a spear, and that blood and water came out (John 19:34).
John immediately flags this as significant: "He who saw it has borne witness — his testimony is true, and he knows that he is telling the truth." (John 19:35)
This detail matters medically: the separation of blood and water is consistent with death by cardiac rupture or pleural effusion — Jesus was truly dead.
The soldier who pierced him becomes an unwitting witness to the reality of the crucifixion.
John is building a legal case. The spear witness is exhibit A.
The Oldest Known Fragment of the New Testament
P52
P52 (Papyrus 52) is a small fragment of John 18:31-33, 37-38 — part of the Pilate trial scene.
Dated to approximately 100–150 AD — within living memory of the apostles.
It was discovered in Egypt, far from where John was written, showing the Gospel had already spread widely very early.
P52 is a physical, archaeological witness to the early circulation and credibility of John's Gospel.
The 'What is truth?' passage — the very exchange Pilate has with Jesus — is preserved in the oldest fragment of the New Testament we have.
The Bible is not a medieval invention. The manuscripts say otherwise.
Peter & Malchus
The detail only a witness would know
All four Gospels record that someone cut off the ear of the high priest's servant in the Garden of Gethsemane.
Only John names both people: "Peter" and "Malchus." (John 18:10)
This level of specific detail — names, not just events — is the hallmark of eyewitness testimony.
Why name Malchus? Perhaps he was known in the early community. Perhaps John simply remembered because he was there.
You don't name minor characters unless you were there — or you know someone who was.
John 19:30
It Is Finished
τετέλεσται — Tetelestai
This single word in Greek — tetelestai — carries enormous weight.
It was used in commercial contexts to mean "paid in full." A debt cleared. A transaction complete.
Jesus' final word in John is not a cry of abandonment — it is a declaration of accomplishment.
The mission is not interrupted by the cross — the cross IS the mission, now completed.
Everything John's Gospel builds toward arrives in one word. Done.
153 Fish
John 21:11 — Why does John count the fish?
After the resurrection, Jesus appears to the disciples on the beach. He tells them to cast the net on the right side, and they catch 153 large fish — and John counts every one.
Why 153? Various theories:
Some early scholars believed 153 was the known number of species of fish in the sea (Jerome) — symbolising the universal reach of the gospel.
Others note it is a triangular number (1+2+3...+17 = 153) — possibly a numerical symbol of completeness.
Or perhaps John simply counted, because he was there and it was unforgettable.
Whatever the symbolism, the specificity of "153" is itself a witness marker — eyewitnesses remember numbers.
"John doesn't say 'a lot of fish.' He says 153. That's a man who counted them."
John Wrote So That You Would Believe
"These are written so that you may believe that Jesus is the Messiah, the Son of God, and that by believing you may have life in his name."
— John 20:31
EYEWITNESS TESTIMONY · GRACE & TRUTH · LIFE IN HIS NAME
John's Gospel is not just a record. It is an invitation.
- gospel-of-john
- theology
- biblical-studies
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- eyewitness-testimony
- p52-manuscript
- new-testament