How do we know the Gospels accurately record the words of Jesus?

Question 60078.

Whether the Gospel accounts accurately record what Jesus said is the question underneath a great many others, and it deserves a proper answer rather than an assertion about inspiration.

I believe these books are the inspired word of God. But that is a conclusion I hold alongside the historical evidence rather than instead of it, and when a sceptical friend asks me why I trust them, quoting a verse about inspiration will not do. So let me lay out the case as I would to someone who does not share my starting point, including the parts that are genuinely difficult.

Dating the Gospel accounts

Start with when they were written, because a late date would be fatal and an early one is powerful.

Acts ends with Paul under house arrest in Rome and does not record his death, the martyrdom of James in 62, the persecution under Nero, or the destruction of the temple in 70. For a book so interested in the fate of the apostles and of Jerusalem, that silence is difficult to explain unless Acts was finished before those events.

If Acts is early, Luke is earlier, since Acts is its second volume. And most scholars accept that Luke used Mark, which pushes Mark earlier still.

That puts the synoptic Gospel accounts within about thirty years of the crucifixion, inside the lifetime of people who were there. Compare the two earliest biographies of Alexander the Great, written four hundred years after his death and used by historians without embarrassment.

Eyewitnesses were still alive

Thirty years is not a long time. Think of what you remember from thirty years ago, particularly the events that changed your life.

More to the point, the eyewitnesses were still around and they included hostile ones. The men who arranged the crucifixion were still in Jerusalem. If the Gospel accounts had invented sayings, there were people with every motive and every opportunity to say so.

Paul, writing to Corinth around 55, lists resurrection appearances and adds that most of the five hundred witnesses are still alive, which is an invitation to go and check. You do not write that sentence if you are making it up.

The Gospels also name people in a way that looks like sourcing. Simon of Cyrene, the father of Alexander and Rufus. Jairus. Bartimaeus. Naming a person who could be asked is not how legends are usually constructed.

How oral tradition actually worked

The standard objection appeals to Chinese whispers, and it misunderstands the culture completely.

First century Judaism was an oral society with formidable memory training. Rabbinic students memorised vast bodies of material verbatim, and a disciple was expected to be able to repeat his teacher’s words.

Jesus taught in the forms designed for memory. Parables, aphorisms, parallelism, and in Aramaic much of it would have carried rhythm and rhyme. This is teaching built to be retained.

And the transmission was communal rather than a chain of individuals. A congregation that had heard the material many times would correct a speaker who got it wrong, which is a very different mechanism from a message whispered down a line.

Multiple independent attestation

Historians value independent sources, and the Gospel accounts supply several.

Mark is one strand. The material shared by Matthew and Luke but not in Mark is another. Matthew’s own material is a third and Luke’s a fourth. John writes largely independently of all of them, and Paul’s letters, earlier than any Gospel, attest the same core.

Where these strands agree on the central claims, and they do, we are not hearing one voice repeated but several voices converging.

Outside the New Testament, Tacitus records the execution under Pilate, Josephus mentions Jesus and the execution of James his brother, and Pliny describes Christians singing hymns to Jesus as to a god. The framework is corroborated from outside.

The embarrassing material

This is the argument I find most persuasive and it is the one sceptics find hardest to answer.

Invented documents flatter their founders. These do not. The disciples are consistently stupid, cowardly and slow. Peter, the leading figure of the early church, is recorded denying Jesus with curses. The family of Jesus think He is out of His mind.

The resurrection is discovered by women, whose testimony carried little weight in that legal culture. If you were fabricating a story to convince first century Jews, you would not choose that detail.

And Jesus is recorded saying things the later church found awkward, including that no one knows the day or the hour, not even the Son. Nobody invents a difficulty for themselves.

The Gospel accounts read like documents constrained by what actually happened rather than shaped by what would have been convenient.

Archaeology and incidental detail

The Gospels are full of small details that a later or distant writer would have got wrong, and archaeology has repeatedly confirmed them.

The pool of Bethesda in John 5, with its five roofed colonnades, was dismissed as symbolic until it was excavated with five colonnades. The pool of Siloam was found in 2004. The Pilate inscription at Caesarea confirmed the prefect’s title. The ossuary of Caiaphas was found in 1990.

Luke in particular gets his titles right in a period when titles varied confusingly from province to province, and he names politarchs at Thessalonica, a term unattested elsewhere until inscriptions turned up using it.

None of this proves that Jesus rose. It does establish that the writers of the Gospel accounts knew the world they were describing at close range.

The manuscript evidence

A separate question is whether what they wrote reached us intact, and here the position is remarkably strong.

There are over five thousand Greek manuscripts of the New Testament, with the earliest fragments within a century or so of composition. For comparison, the Annals of Tacitus survive in two medieval manuscripts.

The variants are numerous, as critics point out, and the overwhelming majority are spelling differences and word order that do not translate. The handful of substantive ones are flagged in the footnotes of any modern Bible, which is itself a sign of honest scholarship rather than concealment.

See also whether we can trust manuscript transmission for more on this.

The differences between the accounts

Now the honest difficulty, because I said I would not skip it. The Gospels do differ, sometimes in ways that require thought.

How many angels at the tomb. The order of the temptations. Whether Jairus’s daughter was dying or dead when he came. The wording of the inscription on the cross.

Some of these resolve easily. Ancient biography did not require chronological order, and writers arranged material thematically as a matter of course. Speeches were reported in substance rather than verbatim, which was normal historiography and not deception. Jesus taught the same material repeatedly in different towns, so similar sayings in different settings are expected.

Others resolve less neatly, and I would rather say so than force a harmonisation. What I notice is that the differences are of the kind you get from independent witnesses to the same event, and their absence would be far more suspicious. Four accounts agreeing word for word would suggest collusion.

A comparison of the parallel passages in the NET Bible notes will show you the shape of the differences honestly.

What the Gospel accounts are not

It is worth being clear about the genre. These are not neutral transcripts and they never claimed to be.

John says openly that he wrote so that you may believe. Luke says he wrote so that Theophilus might have certainty concerning the things he had been taught. They have a purpose and they say so.

But a document with a purpose is not thereby unreliable. A Holocaust survivor’s memoir has a purpose. We do not conclude that it is fiction. In fact, someone who cares deeply about events is often more careful about them, not less.

The Gospel accounts are ancient biography, a recognised genre with recognised conventions, and they should be read according to those conventions rather than as either modern journalism or myth.

Where the argument finally rests

Suppose all of this is granted. Early dating, eyewitness access, careful transmission, corroboration, incidental accuracy, honest difficulties. What follows?

It follows that we are dealing with documents that record what Jesus said and did with substantial accuracy. That is as far as historical argument can take anyone, and it is a good deal further than most people assume.

The remaining step is not historical but personal. C. S. Lewis put the point sharply. A man who said the things Jesus said is not available to us as a great moral teacher, because great moral teachers do not claim to forgive sins committed against other people.

So the reliability of the Gospel accounts does not conclude the matter. It opens it. It puts you in front of the man Himself and asks what you make of Him.

What the earliest sources say about authorship

The traditional attributions are worth examining rather than assuming, and they hold up better than is often suggested.

Papias, writing early in the second century, records that Mark was the interpreter of Peter and wrote down accurately what he remembered, though not in order. Irenaeus, whose teacher Polycarp had known John, names all four evangelists.

Notice the oddity of the names themselves. If you were inventing authorship for authority, you would choose apostles. Mark was not an apostle and is remembered chiefly for abandoning Paul on a missionary journey. Luke was a Gentile physician who saw none of it first hand.

Two of the four Gospel accounts are attributed to men with no obvious claim to prestige, and no manuscript we possess attributes them to anyone else.

The Aramaic underneath the Greek

There is a detail that has always struck me as quietly persuasive. The Greek of the Gospels keeps breaking into Aramaic.

Talitha cumi. Ephphatha. Abba. Eloi, Eloi, lema sabachthani. Each time the writer translates for his Greek readers, which means he could have simply given the translation and did not.

The word abba is particularly telling, since Paul uses it too in letters to Greek-speaking churches who did not need an Aramaic word for father. It had been retained because Jesus used it.

That is not how invented material behaves. It is how memory behaves, holding on to the actual sound of something because the person who said it mattered.

The Gospel accounts carry these fragments the way a family carries a phrase a grandmother used.

Testing the Gospel accounts against how legends form

Sceptics often assume that miracle stories grow over time, and there is truth in the general observation. So test these documents against it.

The apocryphal gospels, written in the second and third centuries, are what legendary development actually looks like. The infancy gospel of Thomas has the boy Jesus striking playmates dead and making clay birds fly. The gospel of Peter has a talking cross emerge from the tomb.

Set those beside Mark, where Jesus sighs, gets tired, is unable to do many miracles in Nazareth because of unbelief, and asks a blind man whether he can see anything yet.

The contrast is stark and it runs the wrong way for the theory. The Gospel accounts are restrained precisely where invention would be extravagant, and the extravagant material appears later and outside the canon.

Anyone can read the apocryphal texts for themselves and make the comparison. I would encourage it, because nothing establishes the sobriety of the four canonical books faster.

Undesigned coincidences

One further line of evidence deserves mention because it is little known and rather elegant.

In several places the Gospel accounts explain each other accidentally. Luke says Herod wanted to see Jesus, and does not say why. Matthew, elsewhere, mentions that Herod had heard reports of Him. John records Jesus asking Philip where they might buy bread, and only Luke tells us the feeding happened near Bethsaida, which John elsewhere notes was Philip’s home town.

These are not the sort of connections a forger builds, because they serve no purpose and nobody would notice them. They are what you get when several people describe the same events from different angles.

William Paley catalogued dozens of these in the eighteenth century and the argument has been revived in recent years. It is worth an hour of anyone’s time.

Together with the early dating and the eyewitness naming, it builds a picture of documents anchored in real events. The orderly account of these books is the sort of thing that only comes from having been there or from having talked to someone who was.

A note on what inspiration adds

I said at the outset that I hold these books to be the inspired word of God, and I should say how that relates to the historical case.

The evidence establishes reliability. Inspiration is a further claim, and it rests on the testimony of Jesus about the Scriptures He had, and on the authority He gave the apostles to teach in His name.

The two work together rather than competing. Historical reliability is the doorway, and it is a doorway the sceptic can walk through without abandoning his standards.

Do not feel obliged to defend inspiration first. Defend the Gospel accounts as documents, let them speak, and let the Jesus in them do His own work.

So, now what?

If you have been treating these books as religious literature rather than as testimony, try reading one straight through in a sitting. Mark takes about ninety minutes. Read it as you would read a witness statement.

If you are a Christian who has never had a reason for trusting them beyond having been told to, do the work. You will find the ground firmer than you expected, and you will be far more use to your friends.

If you are outside all this and unconvinced, I would only ask that you apply the same standards you would to any other ancient document, rather than a stricter one reserved for this case.

And whoever you are, the question the Gospel accounts keep pressing is not really about dates and manuscripts. Jesus asked His disciples who people said He was, and then He asked them directly. Who do you say that I am? See also the evidence for the resurrection.

Many other signs Jesus did in the presence of the disciples, which are not written in this book; but these are written so that you may believe that Jesus is the Christ, the Son of God, and that by believing you may have life in his name.

John 20:30 to 31, ESV

For Further Study

Millard Erickson’s Christian Theology sets out the doctrine of Scripture and the relationship between inspiration and historical evidence with care. Charles Ryrie’s Basic Theology gives a compact evangelical treatment of revelation and the canon. For the historical material, Richard Bauckham’s work on the Gospels as eyewitness testimony is the most significant recent contribution and repays slow reading. Craig Blomberg has written extensively on the historical reliability of the Gospels and handles the differences between the accounts honestly. On the manuscript side, the standard introductions to New Testament textual criticism are readable and will show you the actual state of the evidence rather than the caricature of it. J. Dwight Pentecost’s Words and Works of Jesus Christ is a useful harmony for anyone wanting to work through the parallel accounts systematically.