Shared ground
Matthew presents this as a hostile “test” rather than a neutral request for guidance (v.3). The question is framed around what is permitted: can a man divorce his wife “for any reason?” Jesus answers by moving behind later debate to the creation accounts: God made humans male and female, and marriage is described as a new, joined union where “the two” become “one flesh” (vv.4–6). From that, he draws a conclusion: marriage is not merely a social arrangement; it is something God joins, and humans should not pull it apart (v.6). The Pharisees then try to press Scripture against Scripture by appealing to Moses and the divorce document (v.7).
Where interpretation differs
How broad “for any reason” is. Some read the Pharisees as asking about a very permissive view of divorce (divorce for almost any dissatisfaction). Others read it more generally as “is divorce lawful at all,” with “for any reason” highlighting the range of debated reasons.
What “God has joined together” means in scope. Some take Jesus’ wording as asserting that every valid marriage is a divine joining, so divorce always fights against God’s act. Others emphasize that Jesus is stating God’s design for marriage in general; “God joined” is then less a claim about each individual case and more a statement about what marriage is meant to be.
What Moses was doing in the divorce instruction. The Pharisees say Moses “commanded” divorce by requiring a written certificate (v.7). Interpreters commonly differ on whether Moses is being portrayed as endorsing divorce or as regulating and limiting a practice that was already happening.
Why the disagreement exists
The passage itself does not settle all the legal details because Jesus does not yet answer v.7 in this unit. Instead, he reframes the debate from “what is allowed” to “what the creation story implies.” That creates pressure around how to relate (1) creation ideals and (2) later laws that address broken situations. It also leaves ambiguity about whether Jesus’ “God joined” statement is meant as a universal description of marriage or a narrower point aimed at blocking casual divorce.
What this passage clearly contributes
Explicitly, the text shows Jesus treating the creation accounts as a controlling starting point for understanding marriage (vv.4–5). It also presents marriage as a real unity (“no longer two, but one flesh”) rather than a purely contractual arrangement (v.6). By saying humans should not tear apart what God has joined, Jesus places a strong moral weight against divorcing “for any reason” (v.6), even before the later discussion of Moses’ regulation is addressed (v.7). This unit therefore functions as a foundation: the baseline vision is a God-intended, joined, one-flesh union, and debates about permissions must be measured against that baseline (see also Matthew 5:31–32).