Matthew 5

Jesus recalls a received saying tied to Deuteronomy’s certificate practice. The old word regulated a hard reality; it did not bless hardness of heart as ideal. Disciples already “know” the paperwork path.

The note struck is continuity with Torah’s civil provision and a summons to listen again. The certificate is not dismissed as fiction; the question is whether Jesus’ hearers will stop at legal exit or receive His fuller claim on covenant faithfulness.

“It was also said” sets the tradition Jesus will deepen. Moses’ certificate restrained chaos in a fallen world; it never redefined marriage as a contract one may discard at will.

The Law-giver interprets His own Word. What follows will not erase Moses but expose how far the King’s standard reaches when hardness of heart is no longer the assumed frame.

“But I tell you” raises the bar from certificate to consequence. Unjust divorce can place a wife in an adulterous position; marrying a divorced woman (in the sense Jesus targets) is likewise named adultery—except for the cause of sexual immorality (porneia).

The warning is earnest and the exception is true. Responsible discipleship honors marriage, refuses casual dismissal, and still receives Christ’s word where covenant has already been shattered by sexual immorality. Jesus protects the vulnerable spouse and will not baptize hardness of heart. Grace calls for repentance where we have treated marriage lightly—and for wise, Scripture-bound care in broken homes.

Christ’s “I tell” claims authority over marriage itself. Divorce without the porneia exception “makes her an adulteress”; remarriage in that frame is adultery. The exception clause is Christ’s own merciful precision, not a loophole for convenience.

The King exposes how seriously God joins husband and wife. External legality cannot cleanse a heart that discards a spouse. The warning drives disciples to the grace that both upholds the one-flesh bond and shepherds the wreckage sin leaves—never as permission to despise the covenant Christ defends.