Introduction
Anyone who reads Matthew, Mark, and Luke side by side notices something striking: these three Gospels tell many of the same stories, often in the same order, sometimes with nearly identical wording — yet they also differ in ways both subtle and significant. This pattern is called the Synoptic Problem, and it is one of the most studied issues in New Testament scholarship.
The Data
Approximately 90% of Mark's content appears in Matthew and about 50% in Luke. Matthew and Luke share approximately 235 verses not in Mark — primarily sayings, including the Lord's Prayer and Beatitudes. Each Gospel also contains unique material.
The verbal agreement is sometimes remarkably close — word-for-word in Greek for entire sentences. The agreement extends to order: when Matthew departs from Mark's sequence, Luke follows Mark; when Luke departs, Matthew follows Mark. This alternating agreement suggests a literary relationship.
The Major Solutions
The Two-Source Hypothesis
The dominant solution: Mark was written first; Matthew and Luke independently used Mark plus a hypothetical source "Q" (German Quelle, "source"). Q explains the shared non-Markan material. The main objection: Q is entirely hypothetical — no manuscript has been found.
The Farrer Hypothesis
Accepts Markan priority but eliminates Q: Luke used both Mark and the finished Gospel of Matthew. Simpler (two sources rather than three), but must explain why Luke sometimes seems more primitive than Matthew in shared material.
The Griesbach (Two-Gospel) Hypothesis
Matthew first, Luke used Matthew, Mark condensed both. Must explain why Mark would omit so much material (birth narratives, Sermon on the Mount, many parables).
If the Gospels are literarily dependent, they are not three completely independent witnesses. Understanding the literary relationships helps calibrate the evidential weight of the Gospel testimony. When all three agree, we may have one tradition (Mark's) rather than three. When Matthew or Luke diverges, we have evidence of additional sources or independent knowledge.
Implications for Reliability
Literary dependence does not undermine reliability. If Matthew and Luke used Mark, they had an early account they could verify, supplement, and — where they had better information — correct. The places where they diverge from Mark suggest access to additional information — independent knowledge, other eyewitness testimony, or other sources. The pattern of agreement-with-variation is exactly what we expect from authors consulting a shared source while drawing on their own knowledge.
John and the Synoptics
John stands apart: different material (wedding at Cana, Lazarus, extended discourses), different chronological framework (three-year ministry vs. apparent one-year), omissions (no birth narrative, no parables, no Lord's Supper institution). John is largely independent of the Synoptics, making him a valuable additional witness who confirms the broad outline — Galilean ministry, conflict with authorities, trial and crucifixion in Jerusalem, resurrection — while providing distinct theological perspective.
Conclusion
The Synoptic Problem is not a problem for reliability — it is evidence of a community that cared deeply about preserving Jesus' memory and produced multiple accounts that corroborate and supplement each other. The literary relationships reveal a tradition carefully transmitted, widely known, and important enough for multiple authors to record for different audiences.
Discussion Questions
- The Two-Source Hypothesis posits Mark plus Q; the Farrer Hypothesis eliminates Q. Which do you find more persuasive? Does the existence of multiple viable solutions trouble you, or does it reflect genuine complexity?
- The lesson argues that using an earlier source makes a later writer more, not less, reliable. Do you agree? What would it mean for your confidence if Matthew and Luke demonstrably used Mark?
- John's independence from the Synoptics provides a distinct witness to the same events. How does this strengthen the case for overall reliability? What would it mean if all four Gospels told exactly the same stories in exactly the same way?