Why Are Matthew, Mark, and Luke So Alike?

Foundations

A Striking Pattern

• Matthew, Mark, and Luke share much of their wording and order.
• They are called the “Synoptics” — they can be “seen together.”
• John stands apart in style and content.
• The overlap is too close to be mere coincidence.

Key idea: The Synoptic Problem asks: why are Matthew, Mark, and Luke so similar — sometimes word for word?

Source: Standard New Testament introductions.

The Evidence

How Close Is It?

• About 90% of Mark's content appears in Matthew and/or Luke.
• Often the Greek wording matches almost exactly.
• The order of events frequently agrees.
• Yet each Gospel also carries unique material.

Useful fact: Roughly 90% of Mark shows up in Matthew or Luke — far beyond what shared memory alone would produce.

Source: Synoptic data in standard Gospel studies.

The Evidence

Why It Suggests Sources

• Such close verbal agreement points to literary copying, not just oral memory.
• The Gospel writers very likely used written sources.
• This was normal ancient practice — and not a problem for inspiration.
• The real question is who used whom.

Useful fact: Luke openly says he researched earlier accounts before writing (Luke 1:1–4) — ancient authors used sources.

Source: Luke 1:1–4.

The Solution

Markan Priority

• Most scholars hold that Mark was written first.
• Matthew and Luke each appear to have used Mark.
• Mark's rougher Greek and shorter form look earliest.
• It neatly explains the shared order and wording.

Key idea: The majority view: Mark came first, and both Matthew and Luke drew on it.

Source: Standard NT introductions.

The Solution

The “Q” Hypothesis

• Matthew and Luke also share material not found in Mark — mostly sayings.
• Many posit a lost sayings source called “Q” (from German Quelle, “source”).
• Q is a hypothesis, not a discovered document.
• Mark plus Q together is the “Two-Source” theory.

Useful fact: “Q” is a proposed lost collection of Jesus' sayings — inferred, not found. Its existence is debated.

Source: The Two-Source theory; standard discussions.

Alternatives

Other Models

• The Farrer theory: Luke used both Mark and Matthew — so no Q is needed.
• The Griesbach (Two-Gospel) theory: Matthew was first and Mark last.
• Each explains some of the data better than the others.
• The debate is technical and ongoing.

Honest note: “Markan priority plus Q” is the majority view, not a proven fact — serious scholars defend the alternatives.

Source: Mark Goodacre, The Case Against Q (2002).

Implications

Does Copying Undermine the Gospels?

• No — using sources is how careful ancient history was written.
• Luke explicitly researched his account (Luke 1:1–4).
• Shared wording shows continuity, not fabrication.
• The differences reflect each author's purpose and audience.

Key idea: Literary dependence isn't a scandal — it's evidence the writers transmitted received material rather than inventing it.

Source: Standard treatments of Gospel composition.

Implications

Why the Differences?

• Each evangelist shapes the story for his readers.
• Matthew highlights Jesus as the Jewish Messiah.
• Luke stresses the outsider, the poor, and prayer.
• Mark moves fast, driving toward the cross.

Source: Standard Gospel introductions.

Honest Limits

What Stays Uncertain

• We don't possess the writers' source documents.
• “Q,” if it existed, is a reconstruction, not a manuscript.
• The exact relationships can't be proven, only argued.
• The big picture (shared sources) is secure; the fine detail isn't.

Honest note: The tidy diagrams in textbooks are models — the source documents themselves are lost, so some uncertainty is permanent.

Source: Acknowledged across the field.

Conclusion

The Big Takeaway

• The Synoptics are closely related literary documents.
• Markan priority — often with Q — is the leading explanation.
• This reflects careful transmission, not invention.
• Knowing the relationship helps us read each Gospel on its own terms.

In one line: Three Gospels, deeply interwoven — most likely Mark first, shared and reshaped by Matthew and Luke.

Source: Standard NT scholarship; Goodacre.