Christian sources, such as the New Testament books in the Christian Bible, include detailed stories about Jesus but scholars differ on the historicity of specific episodes described in the Biblical accounts of Jesus. The only two events subject to "almost universal assent" are that Jesus was baptized by John the Baptist and was crucified by the order of the Roman Prefect Pontius Pilate. Non-Christian sources that are used to study and establish the historicity of Jesus include Jewish sources such as Josephus, and Roman sources such as Tacitus. These sources are compared to Christian sources such as the Pauline Epistles and the Synoptic Gospels. These sources are usually independent of each other (e.g. Jewish sources do not draw upon Roman sources), and similarities and differences between them are used in the authentication process. In a review of the state of research, the Jewish scholar Amy-Jill Levine stated that "no single picture of Jesus has convinced all, or even most scholars" and that all portraits of Jesus are subject to criticism by some group of scholars.
The writings of the 1st century Romano-Jewish historian Flavius Josephus include references to Jesus and the origins of Christianity. Josephus' Antiquities of the Jews, written around 93–94 CE, includes two references to Jesus in Books 18 and 20.
Of the two passages, the James passage in Book 20 is used by scholars to support the existence of Jesus, the Testimonium Flavianum in Book 18 his crucifixion. Josephus' James passage attests to the existence of Jesus as a historical person and that some of his contemporaries considered him the Messiah. According to Bart Ehrman, Josephus' passage about Jesus was altered by a Christian scribe, including the reference to Jesus as the Messiah.
A textual argument against the authenticity of the James passage is that the use of the term "Christos" there seems unusual for Josephus. An argument based on the flow of the text in the document is that, given that the mention of Jesus appears in the Antiquities before that of the John the Baptist, a Christian interpolator may have inserted it to place Jesus in the text before John. A further argument against the authenticity of the James passage is that it would have read well even without a reference to Jesus.
The passage deals with the death of "James the brother of Jesus" in Jerusalem. Whereas the works of Josephus refer to at least twenty different people with the name Jesus, this passage specifies that this Jesus was the one "who was called Christ". Louis Feldman states that this passage, above others, indicates that Josephus did say something about Jesus.
Modern scholarship has almost universally acknowledged the authenticity of the reference in Book 20, Chapter 9, 1 of the Antiquities to "the brother of Jesus, who was called Christ, whose name was James", and considers it as having the highest level of authenticity among the references of Josephus to Christianity.
The Testimonium Flavianum (meaning the testimony of Flavius [Josephus]) is the name given to the passage found in Book 18, Chapter 3, 3 of the Antiquities in which Josephus describes the condemnation and crucifixion of Jesus at the hands of the Roman authorities. Scholars have differing opinions on the total or partial authenticity of the reference in the passage to the execution of Jesus by Pontius Pilate. The general scholarly view is that while the Testimonium Flavianum is most likely not authentic in its entirety, it is broadly agreed upon that it originally consisted of an authentic nucleus with a reference to the execution of Jesus by Pilate which was then subject to Christian interpolation. Although the exact nature and extent of the Christian redaction remains unclear, there is broad consensus as to what the original text of the Testimonium by Josephus would have looked like.
The references found in Antiquities have no parallel texts in the other work by Josephus such as the Jewish War, written twenty years earlier, but some scholars have provided explanations for their absence, such as that the Antiquities covers a longer time period and that during the twenty-year gap between the writing of the Jewish Wars (c. 70 CE) and Antiquities (after 90 CE) Christians had become more important in Rome and were hence given attention in the Antiquities.
A number of variations exist between the statements by Josephus regarding the deaths of James and the New Testament accounts. Scholars generally view these variations as indications that the Josephus passages are not interpolations, because a Christian interpolator would more likely have made them correspond to the Christian traditions. Robert Eisenman provides numerous early Christian sources that confirm the Josephus testament, that James was the brother of Jesus.
The Roman historian and senator Tacitus referred to Christ, his execution by Pontius Pilate and the existence of early Christians in Rome in his final work, Annals (c. CE 116), book 15, chapter 44. The relevant passage reads: "called Christians by the populace. Christus, from whom the name had its origin, suffered the extreme penalty during the reign of Tiberius at the hands of one of our procurators, Pontius Pilatus."
Scholars generally consider Tacitus's reference to the execution of Jesus by Pontius Pilate to be both authentic, and of historical value as an independent Roman source about early Christianity that is in unison with other historical records. William L. Portier has stated that the consistency in the references by Tacitus, Josephus and the letters to Emperor Trajan by Pliny the Younger reaffirm the validity of all three accounts.
Tacitus was a patriotic Roman senator and his writings shows no sympathy towards Christians. Andreas Köstenberger and separately Robert E. Van Voorst state that the tone of the passage towards Christians is far too negative to have been authored by a Christian scribe – a conclusion shared by John P. Meier Robert E. Van Voorst states that "of all Roman writers, Tacitus gives us the most precise information about Christ".
John Dominic Crossan considers the passage important in establishing that Jesus existed and was crucified, and states: "That he was crucified is as sure as anything historical can ever be, since both Josephus and Tacitus... agree with the Christian accounts on at least that basic fact." Bart D. Ehrman states: "Tacitus's report confirms what we know from other sources, that Jesus was executed by order of the Roman governor of Judea, Pontius Pilate, sometime during Tiberius's reign." Eddy and Boyd state that it is now "firmly established" that Tacitus provides a non-Christian confirmation of the crucifixion of Jesus.
Although the majority of scholars consider it to be genuine, a few scholars question the authenticity of the passage given that Tacitus was born 25 years after Jesus' death.
Some scholars have debated the historical value of the passage given that Tacitus does not reveal the source of his information. Gerd Theissen and Annette Merz argue that Tacitus at times had drawn on earlier historical works now lost to us, and he may have used official sources from a Roman archive in this case; however, if Tacitus had been copying from an official source, some scholars would expect him to have labeled Pilate correctly as a prefect rather than a procurator. Theissen and Merz state that Tacitus gives us a description of widespread prejudices about Christianity and a few precise details about "Christus" and Christianity, the source of which remains unclear. However, Paul R. Eddy has stated that given his position as a senator Tacitus was also likely to have had access to official Roman documents of the time and did not need other sources.
Michael Martin notes that the authenticity of this passage of the Annals has also been disputed on the grounds that Tacitus would not have used the word “messiah” in an authentic Roman document.
Weaver notes that Tacitus spoke of the persecution of Christians, but no other Christian author wrote of this persecution for a hundred years.
Hotema notes that this passage was not quoted by any Church father up to the 15th century, although the passage would have been very useful to them in their work; and that the passage refers to the Christians in Rome being a multitude, while at that time the Christian congregation in Rome would actually have been very small.
Richard Carrier has put forward the ideas that the 'Christ, the author of this name, was executed by the procurator Pontius Pilate in the reign of Tiberius' line is a Christian interpolation and that Tacitus wrote about Chrestians not Christians.
Scholars have also debated the issue of hearsay in the reference by Tacitus. Charles Guignebert argued that "So long as there is that possibility [that Tacitus is merely echoing what Christians themselves were saying], the passage remains quite worthless". R. T. France states that the Tacitus passage is at best just Tacitus repeating what he had heard through Christians. However, Paul R. Eddy has stated that as Rome's preeminent historian, Tacitus was generally known for checking his sources and was not in the habit of reporting gossip. Tacitus was a member of the Quindecimviri sacris faciundis, a council of priests whose duty it was to supervise foreign religious cults in Rome, which as Van Voorst points out, makes it reasonable to suppose that he would have acquired knowledge of Christian origins through his work with that body.
Mara (son of Sarapion) was a Stoic philosopher from the Roman province of Syria. Sometime between 73 CE and the 3rd century, Mara wrote a letter to his son (also called Sarapion) which may contain an early non-Christian reference to the crucifixion of Jesus.
The letter refers to the unjust treatment of "three wise men": the murder of Socrates, the burning of Pythagoras, and the execution of "the wise king" of the Jews. The author explains that in all three cases the wrongdoing resulted in the future punishment of those responsible by God and that when the wise are oppressed, not only does their wisdom triumph in the end, but God punishes their oppressors.
The letter includes no Christian themes and the author is presumed to be a pagan. Some scholars see the reference to the execution of the "wise king" of the Jews as an early non-Christian reference to Jesus. Criteria that support the non-Christian origin of the letter include the observation that "king of the Jews" was not a Christian title, and that the letter's premise that Jesus lives on based on the wisdom of his teachings is in contrast to the Christian concept that Jesus continues to live through his resurrection.
Scholars such as Robert Van Voorst see little doubt that the reference to the execution of the "king of the Jews" is about the death of Jesus. Others such as Craig A. Evans see less value in the letter, given its uncertain date, and the possible ambiguity in the reference.
The Roman historian Suetonius (c. 69 – after 122 CE) made references to early Christians and their leader in his work Lives of the Twelve Caesars (written 121 CE). The references appear in Claudius 25 and Nero 16 which describe the lives of Roman Emperors Claudius and Nero. The Nero 16 passage refers to the abuses by Nero and mentions how he inflicted punishment on Christians – which is generally dated to around CE 64. This passage shows the clear contempt of Suetonius for Christians - the same contempt expressed by Tacitus and Pliny the younger in their writings, but does not refer to Jesus himself.
The reference in Claudius 25 involves the agitations in the Jewish community which led to the expulsion of some Jews from Rome by Claudius, and is likely the same event mentioned in the Acts of the Apostles (18:2). Most historians date this expulsion to around CE 49–50. Suetonius refers to the leader of the Christians as Chrestus, a term also used by used by Tacitus, referred in Latin dictionaries as a (amongst other things) version of 'Christus'. However, the wording used by Suetonius implies that Chrestus was alive at the time of the disturbance and was agitating the Jews in Rome. This weakens the historical value of his reference as a whole, and there is no overall scholarly agreement about its value as a reference to Jesus. However, the confusion of Suetonius also points to the lack of Christian interpolation, for a Christian scribe would not have confused the Jews with Christians.
Most scholars assume that in the reference Jesus is meant and that the disturbances mentioned were due to the spread of Christianity in Rome. However, scholars are divided on the value of the Suetonius' reference. Some scholars such as Craig A. Evans, John Meier and Craig S. Keener see it as a likely reference to Jesus. Others such as Stephen Benko and H. Dixon Slingerland see it as having little or no historical value.
Menahem Stern states Suetonius definitely was referring to Jesus; because he would have added "a certain" to Chrestus if he had meant some unknown agitator.
The Babylonian Talmud in a few cases includes possible references to Jesus using the terms "Yeshu", "Yeshu ha-Notzri", "ben Stada", and "ben Pandera". Some of these references probably date back to the Tannaitic period (70–200 CE). In some cases, it is not clear if the references are to Jesus, or other people, and scholars continue to debate their historical value, and exactly which references, if any, may be to Jesus.
Robert Van Voorst states that the scarcity of Jewish references to Jesus is not surprising, given that Jesus was not a prominent issue for the Jews during the first century, and after the devastation caused by the Siege of Jerusalem in the year 70, Jewish scholars were focusing on preserving Judaism itself, rather than paying much attention to Christianity.
Robert Eisenman argues that the derivation of Jesus of Nazareth from "ha-Notzri" is impossible on etymological grounds, as it would suggest rather "the Nazirite" rather than "the Nazarene".
Van Voorst states that although the question of who was referred to in various points in the Talmud remains subject to debate among scholars, in the case of Sanhedrin 43a (generally considered the most important reference to Jesus in rabbinic literature), Jesus can be confirmed as the subject of the passage, not only from the reference itself, but from the context that surrounds it, and there is little doubt that it refers to the death of Jesus of Nazareth. Christopher M. Tuckett states that if it is accepted that death narrative of Sanhedrin 43a refers to Jesus of Nazareth then it provides evidence of Jesus' existence and execution.
Andreas Kostenberger states that the passage is a Tannaitic reference to the trial and death of Jesus at Passover and is most likely earlier than other references to Jesus in the Talmud. The passage reflects hostility toward Jesus among the rabbis and includes this text:
It is taught: On the eve of Passover they hung Yeshu and the crier went forth for forty days beforehand declaring that "[Yeshu] is going to be stoned for practicing witchcraft, for enticing and leading Israel astray. Anyone who knows something to clear him should come forth and exonerate him." But no one had anything exonerating for him and they hung him on the eve of Passover.
Peter Schäfer states that there can be no doubt that the narrative of the execution of Jesus in the Talmud refers to Jesus of Nazareth, but states that the rabbinic literature in question are not Tannaitic but from a later Amoraic period and may have drawn on the Christian gospels, and may have been written as responses to them. Bart Ehrman and separately Mark Allan Powell state that given that the Talmud references are quite late, they can give no historically reliable information about the teachings or actions of Jesus during his life.
Another reference in early second century Rabbinic literature (Tosefta Hullin II 22) refers to Rabbi Eleazar ben Dama who was bitten by a snake, but was denied healing in the name of Jesus by another Rabbi for it was against the law, and thus died. This passage reflects the attitude of Jesus' early Jewish opponents, i.e. that his miracles were based on evil powers.
Eddy and Boyd, who question the value of several of the Talmudic references state that the significance of the Talmud to historical Jesus research is that it never denies the existence of Jesus, but accuses him of sorcery, thus indirectly confirming his existence. R. T. France and separately Edgar V. McKnight state that the divergence of the Talmud statements from the Christian accounts and their negative nature indicate that they are about a person who existed. Craig Blomberg states that the denial of the existence of Jesus was never part of the Jewish tradition, which instead accused him of being a sorcerer and magician, as also reflected in other sources such as Celsus. Andreas Kostenberger states that the overall conclusion that can be drawn from the references in the Talmud is that Jesus was a historical person whose existence was never denied by the Jewish tradition, which instead focused on discrediting him.
Pliny the Younger (c. 61 – c. 112), the provincial governor of Pontus and Bithynia, wrote to Emperor Trajan c. 112 concerning how to deal with Christians, who refused to worship the emperor, and instead worshiped "Christus". Charles Guignebert, who does not doubt that Jesus of the Gospels lived in Gallilee in the 1st century, nevertheless dismisses this letter as acceptable evidence for a historical Jesus.
Thallus, of whom very little is known, and none of whose writings survive, wrote a history allegedly around the middle to late first century CE, to which Eusebius referred. Julius Africanus, writing c 221, links a reference in the third book of the History to the period of darkness described in the crucifixion accounts in three of the Gospels . It is not known whether Thallus made any mention to the crucifixion accounts; if he did, it would be the earliest noncanonical reference to a gospel episode, but its usefulness in determining the historicity of Jesus is uncertain. The dating of Thallus is dependent on him writing about an event during the 207th Olympiad (49–52 AD), which means he wrote after that date, not near that date. This depends on the text being corrupt, which would mean Thallus could have been writing after the 217th Olympiad (89–92 AD), or even the 167th Olympiad (112–109 BC). He is first referenced by Theophilus, writing around 180 AD, which means Thallus could have written any time between 109 BC and 180 AD. All we know is Thallus mentioned a solar eclipse, and as solar eclipses are not possible at Passover, that would mean Thallus was not talking about the crucifixion of Jesus at all.
Phlegon of Tralles, AD 80–140, similar to Thallus, Julius Africanus mentions a historian named Phlegon who wrote a chronicle of history around AD 140, where he records: “Phlegon records that, in the time of Tiberius Caesar, at full moon, there was a full eclipse of the sun from the sixth to the ninth hour.” (Africanus, Chronography, 18:1) Phlegon is also mentioned by Origen (an early church theologian and scholar, born in Alexandria): “Now Phlegon, in the thirteenth or fourteenth book, I think, of his Chronicles, not only ascribed to Jesus a knowledge of future events . . . but also testified that the result corresponded to His predictions.” (Origen Against Celsus, Book 2, Chapter 14) “And with regard to the eclipse in the time of Tiberius Caesar, in whose reign Jesus appears to have been crucified, and the great earthquakes which then took place … ” (Origen Against Celsus, Book 2, Chapter 33) “Jesus, while alive, was of no assistance to himself, but that he arose after death, and exhibited the marks of his punishment, and showed how his hands had been pierced by nails.” (Origen Against Celsus, Book 2, Chapter 59). However, Eusebius in The Chronicon (written in the 4th century AD) records what Phlegon said verbatim. "Now, in the fourth year of the 202nd Olympiad [32 AD], a great eclipse of the sun occurred at the sixth hour [noon] that excelled every other before it, turning the day into such darkness of night that the stars could be seen in heaven, and the earth moved in Bithynia, toppling many buildings in the city of Nicaea." Phlegon never mentions Jesus or the 3 hour darkness. He also mentions a solar eclipse, which can not occur at Passover. Apart from the year (which may be a corruption), this description fits an earthquake and eclipse that occurred in North West Turkey on November, 29 AD.
Celsus writing late in the second century produced the first full-scale attack on Christianity. Celsus' document has not survived but in the third century Origen replied to it, and what is known of Celsus' writing is through the responses of Origen. According to Origen, Celsus accused Jesus of being a magician and a sorcerer. While the statements of Celsus may be seen as valuable, they have little historical value, given that the wording of the original writings can not be examined.
The Dead Sea Scrolls are first century or older writings that show the language and customs of some Jews of Jesus' time. Scholars such as Henry Chadwick see the similar uses of languages and viewpoints recorded in the New Testament and the Dead Sea Scrolls as valuable in showing that the New Testament portrays the first century period that it reports and is not a product of a later period. However, the relationship between the Dead Sea scrolls and the historicity of Jesus has been the subject of highly controversial theories, and although new theories continue to appear, there is no overall scholarly agreement about their impact on the historicity of Jesus, despite the usefulness of the scrolls in shedding light on first-century Jewish traditions.
The following sources are disputed, and of limited historical value, but they are at least proof of Christians existing and being known and talked about in the first and second centuries.
There is a limestone burial box from the 1st century known as the James Ossuary with the Aramaic inscription, "James, son of Joseph, brother of Jesus." The authenticity of the inscription was challenged by the Israel Antiquities Authority, who filed a complaint with the Israeli police. In 2012, the owner of the ossuary was found not guilty, with the judge ruling that the authenticity of the ossuary inscription had not been proven either way. It has been suggested it was a forgery.
Various books, memoirs and stories were written about Jesus by the early Christians. The most famous are the gospels of Matthew, Mark, Luke and John. All but one of these are believed to have been written within 50–70 years of the death of Jesus, with the Gospel of Mark believed to be the earliest, and the last the Gospel of John. Blainey writes that the oldest surviving record written by an early Christian is a short letter by St Paul: the First Epistle to the Thessalonians, which appeared about 25 years after the death of Jesus. This letter, while important in describing issues for the development of Gentilic Christianity, contains little of significance for understanding the life of the historic Jesus.
Bart Ehrman, Robert Eisenman and others critical of traditional Christian views, in assessing the problems involved in conducting historical Jesus research, say the Gospels are full of discrepancies, were written decades after Jesus' death, by authors who had not witnessed any events in Jesus' life. They go on to say the Gospels were authored not by eyewitnesses who were contemporary with the events that they narrate but rather by people who did not know Jesus, see anything he did, or hear anything he taught, and that the authors did not even share a language with Jesus. The accounts they produced are not disinterested; they are narratives produced by Christians who actually believed in Jesus, and were not immune from slanting the stories in light of their biases. Ehrman points out that the texts are widely inconsistent, full of discrepancies and contradictions in both details and larger portraits of who Jesus was.
In the context of Christian sources, even if all other texts are ignored, the Pauline epistles can provide some information regarding Jesus. This information does not include a narrative of the life of Jesus, and refers to his existence as a person, but adds few specific items apart from his death by crucifixion. This information comes from those letters of Paul whose authenticity is not disputed. Paul was not a companion of Jesus and claims his information comes from the holy spirit acquired after Jesus' death.
Of the thirteen letters that bear Paul's name, seven are considered authentic by almost all scholars, and the others are generally considered pseudepigraphic. The 7 undisputed letters (and their approximate dates) are: 1 Thessalonians (c. 51 CE), Philippians (c. 52–54 CE), Philemon (c. 52–54 CE), 1 Corinthians (c. 53–54 CE), Galatians (c. 55 CE), 2 Corinthians (c. 55–56 CE) and Romans (c. 55–58 CE). The authenticity of these letters is accepted by almost all scholars, and they have been referenced and interpreted by early authors such as Origen and Eusebius.
Given that the Pauline epistles are generally dated to CE 50 to CE 60, they are the earliest surviving Christian texts that include information about Jesus. These letters were written approximately twenty to thirty years after the generally accepted time period for the death of Jesus, around CE 30–36. The letters were written during a time when Paul recorded encounters with the disciples of Jesus, e.g. Galatians 1:18 states that several years after his conversion Paul went to Jerusalem and stayed with Apostle Peter for fifteen days. During this time, Paul disputed the nature of Jesus' message with Jesus's brother James, concerning the importance of adhering to kosher food restrictions and circumcision, important features of determining Jewish identity.
The Pauline letters were not intended to provide a narrative of the life of Jesus, but were written as expositions of Christian teachings. In Paul's view, the earthly life of Jesus was of a lower importance than the theology of his death and resurrection,a theme that permeates Pauline writings. However, the Pauline letters clearly indicate that for Paul Jesus was a real person (born of a woman as in Gal 4.4), a Jew ("born under the law", Romans 1.3) who had disciples (1 Corinthians 15.5), who was crucified (as in 1 Corinthians 2.2 and Galatians 3.1) and who resurrected from the dead (1 Corinthians 15.20, Romans 1.4 and 6.5, Philippians 3:10–11). And the letters reflect the general concept within the early Gentillic Christian Church that Jesus existed, was crucified and was raised from the dead.
The references by Paul to Jesus do not in themselves prove the existence of Jesus, but they do establish that the existence of Jesus was the accepted norm within the early Christians (including the Christian community in Jerusalem, given the references to collections there) twenty to thirty years after the death of Jesus, at a time when those who could have been acquainted with him could still be alive.
The existence of only these references to Jesus in the Pauline epistles has given rise to criticism of them by G. A. Wells, who is generally accepted as a leader of the movement to deny the historicity of Jesus. When Wells was still denying the existence of Jesus, he criticized the Pauline epistles for not mentioning items such as John the Baptist or Judas or the trial of Jesus and used that argument to conclude that Jesus was not a historical figure.
James D. G. Dunn addressed Wells' statement and stated that he knew of no other scholar that shared that view, and most other scholars had other and more plausible explanations for the fact that Paul did not include a narrative of the life of Jesus in his letters, which were primarily written as religious documents rather than historical chronicles at a time when the life story of Jesus could have been well known within the early Church. Dunn states that despite Wells' arguments, the theories of the non-existence of Jesus are a "thoroughly dead thesis".
While Wells no longer denies the existence of Jesus, he has responded to Dunn, stating that his arguments from silence not only apply to Paul but all early Christian authors, and that he still has a low opinion of early Christian texts, maintaining that for Paul Jesus may have existed a good number of decades before.
The Pauline letters sometimes refer to creeds, or confessions of faith, that predate their writings. For instance 1 Corinthians 15:3–4 reads: "For what I received I passed on to you as of first importance: that Christ died for our sins according to the Scriptures, that he was buried, that he was raised on the third day according to the Scriptures." Romans 1:3–4 refers to Romans 1:2 just before it which mentions an existing gospel, and in effect may be treating it as an earlier creed.
One of the keys to identifying a pre-Pauline tradition is given in 1 Corinthians 15:11
Here Paul refers to others before him who preached the creed. James Dunn states that 1 Corinthians 15:3 indicates that in the 30s Paul was taught about the death of Jesus a few years earlier.
The Pauline letters thus contain Christian creed elements of pre-Pauline origin. The antiquity of the creed has been located by many Biblical scholars to less than a decade after Jesus' death, originating from the Jerusalem apostolic community. Concerning this creed, Campenhausen wrote, "This account meets all the demands of historical reliability that could possibly be made of such a text," whilst A. M. Hunter said, "The passage therefore preserves uniquely early and verifiable testimony. It meets every reasonable demand of historical reliability."
These creeds date to within a few years of Jesus' death, and developed within the Christian community in Jerusalem. Although embedded within the texts of the New Testament, these creeds are a distinct source for Early Christianity. This indicates that existence and death of Jesus was part of Christian belief a few years after his death and over a decade before the writing of the Pauline epistles.
The four canonical gospels, Matthew, Mark, Luke, and John, are the main sources for the biography of Jesus' life, the teachings and actions attributed to him. Three of these (Matthew, Mark, and Luke) are known as the synoptic Gospels, from the Greek σύν (syn "together") and ὄψις (opsis "view"), given that they display a high degree of similarity in content, narrative arrangement, language and paragraph structure. The presentation in the fourth canonical gospel, i.e. John, differs from these three in that it has more of a thematic nature rather than a narrative format. Scholars generally agree that it is impossible to find any direct literary relationship between the synoptic gospels and the Gospel of John.
The authors of the New Testament generally showed little interest in an absolute chronology of Jesus or in synchronizing the episodes of his life with the secular history of the age. The gospels were primarily written as theological documents in the context of early Christianity with the chronological timelines as a secondary consideration. One manifestation of the gospels being theological documents rather than historical chronicles is that they devote about one third of their text to just seven days, namely the last week of the life of Jesus in Jerusalem. Although the gospels do not provide enough details to satisfy the demands of modern historians regarding exact dates, scholars have used them to reconstruct a number of portraits of Jesus. However, as stated in John 21:25 the gospels do not claim to provide an exhaustive list of the events in the life of Jesus.
Scholars have varying degrees of certainty about the historical reliability of the accounts in the gospels, and the only two events whose historicity is the subject of almost universal agreement among scholars are the baptism and crucifixion of Jesus. Scholars such as E.P. Sanders and separately Craig A. Evans go further and assume that two other events in the gospels are historically certain, namely that Jesus called disciples, and caused a controversy at the Temple.
Ever since the Augustinian hypothesis, scholars continue to debate the order in which the gospels were written, and how they may have influenced each other, and several hypothesis exist in that regard, e.g. the Markan priority hypothesis holds that the Gospel of Mark was written first c. 70 CE. In this approach, Matthew is placed at being sometime after this date and Luke is thought to have been written between 70 and 100 CE. However, according to the competing, and more popular, Q source hypothesis, the gospels were not independently written, but were derived from a common source called Q. The two-source hypothesis then proposes that the authors of Matthew and Luke drew on the Gospel of Mark as well as on Q.
The gospels can be seen as having three separate lines: A literary line which looks at it from a textual perspective, secondly a historical line which observes how Christianity started as a renewal movement within Judaism and eventually separated from it, and finally a theological line which analyzes Christian teachings. Within the historical perspective, the gospels are not simply used to establish the existence of Jesus as sources in their own right alone, but their content is compared and contrasted to non-Christian sources, and the historical context, to draw conclusions about the historicity of Jesus.
The works of Papias have not survived, but Eusebius quotes him as saying:
Richard Bauckham states that while Papias was collecting his information (c. 90), Aristion and the elder John (who were Jesus' disciples) were still alive and teaching in Asia minor, and Papias gathered information from people who had known them. However, the exact identity of the "elder John" is wound up in the debate on the authorship of the Gospel of John, and scholars have differing opinions on that, e.g. Jack Finegan states that Eusebius may have misunderstood what Papias wrote, and the elder John may be a different person from the author of the fourth gospel, yet still a disciple of Jesus. Gary Burge, on the other hand sees confusion on the part of Eusebius and holds the elder John to be different person from the apostle John.
The letter of Quadratus (possibly the first Christian apologist) to emperor Hadrian (who reigned 117 – 138) is likely to have an early date and is reported by Eusebius in his Ecclesiastical History 4.3.2 to have stated:
By "our Savior" Quadratus means Jesus and the letter is most likely written before CE 124. Bauckham states that by "our times" he may refer to his early life, rather than when he wrote (117–124), which would be a reference contemporary with Papias. Bauckham states that the importance of the statement attributed to Quadratus is that he emphasizes the "eye witness" nature of the testimonies to interaction with Jesus. Such "eye witness statements" abound in early Christian writings, particularly the pseudonymous Christian Apocrypha, Gospels and Letters, in order to give them credibility.
A number of later Christian texts, usually dating to the second century or later, exist as New Testament apocrypha, among which the gnostic gospels have been of major recent interest among scholars. The 1945 discovery of the Nag Hammadi library created a significant amount of scholarly interest and many modern scholars have since studied the gnostic gospels and written about them. However, the trend among the 21st century scholars has been to accept that while the gnostic gospels may shed light on the progression of early Christian beliefs, they offer very little to contribute to the study of the historicity of Jesus, in that they are rather late writings, usually consisting of sayings (rather than narrative, similar to the hypothesised Q documents), their authenticity and authorship remain questionable, and various parts of them rely on components of the New Testament. The focus of modern research into the historical Jesus has been away from gnostic writings and towards the comparison of Jewish, Greco-Roman and canonical Christian sources.
As an example, Bart Ehrman states that gnostic writings of the Gospel of Thomas (part of the Nag Hammadi library) have very little value in historical Jesus research, because the author of that gospel placed no importance on the physical experiences of Jesus (e.g. his crucifixion) or the physical existence of believers, and was only interested in the secret teachings of Jesus rather than any physical events. Similarly, the Apocryphon of John (also part of the Nag Hammadi library) has been useful in studying the prevailing attitudes in the second century, and questions of authorship regarding the Book of revelation, given that it refers to Revelation 1:19, but is mostly about the post ascension teachings of Jesus in a vision, not a narrative of his life. Some scholars such as Edward Arnal contend that the Gospel of Thomas continues to remain useful for understanding how the teachings of Jesus were transmitted among early Christians, and sheds light on the development of early Christianity.
There is overlap between the sayings of Jesus in the apocryphal texts and canonical Christian writings, and those not present in the canonical texts are called agrapha. There are at least 225 agrapha but most scholars who have studied them have drawn negative conclusions about the authenticity of most of them and see little value in using them for historical Jesus research. Robert Van Voorst states that the vast majority of the agrapha are certainly inauthentic. Scholars differ on the number of authentic agrapha, some estimating as low as seven as authentic, others as high as 18 among the more than 200, rendering them of little value altogether. While research on apocryphal texts continues, the general scholarly opinion holds that they have little to offer to the study of the historicity of Jesus given that they are often of uncertain origin, and almost always later documents of lower value.