Shared ground
Hebrews 7:1–3 retells the brief scene from Genesis 14:17–20 and spotlights details the Genesis story gives (and does not give). Melchizedek is presented as both king and priest, and as someone who blesses Abraham and receives a tenth from him. These actions place Melchizedek in a position of recognized honor in relation to Abraham.
The writer also treats Melchizedek’s name (“king of righteousness”) and title (“king of peace”) as meaningful for the argument. Then Hebrews makes a key move: it builds significance not only from what Scripture says about Melchizedek, but also from what Scripture doesn’t record—no parents, genealogy, or life boundaries.
Where interpretation differs
Some readers take “without father, without mother… neither beginning of days nor end of life” as describing Melchizedek’s real, historical nature (more than a normal human life). Others read these phrases as describing the way Melchizedek appears in the Genesis narrative: Scripture does not supply ancestry or death, so within the text he functions as a priest whose story is not bounded by genealogy or lifespan.
A related difference appears in “made like the Son of God.” Some take this as pointing to an unusually direct identity connection between Melchizedek and the Son of God. Others take it as a comparison of roles and literary portrayal: Melchizedek is shaped by the text to resemble the Son, not the other way around.
Why the disagreement exists
The wording in verse 3 is strong and absolute (“without… neither… nor…”), which can sound like biography. Yet the surrounding context is a close reading of Genesis, where the lack of recorded lineage and death is observable. Readers differ on whether Hebrews is extending that silence into a claim about Melchizedek’s actual origin and lifespan, or using the silence as part of Scripture’s portrait for argument.
What this passage clearly contributes
Explicitly, the passage establishes Melchizedek as king of Salem, priest of God Most High, the one who blessed Abraham, and the one who received a tenth from Abraham. It also explicitly claims that Scripture presents him with no recorded genealogy or life boundaries, and on that basis states he is “made like the Son of God” and “remains a priest continually.”
Theological inference (built from those claims) is that Hebrews is preparing the ground for a priesthood that is not dependent on inherited lineage and can be spoken of as continuing—an important setup for the book’s argument about Jesus as high priest in this “order” (Hebrews 5:10).