Passage

Matthew 5.17

Book: Matthew · NASB95

Verse

"Do not think that I came to abolish the Law or the Prophets; I did not come to abolish but to fulfill." (Matthew 5:17, NASB95)

Immediate context (±2 verses)

"For truly I say to you, until heaven and earth pass away, not the smallest letter or stroke shall pass from the Law until all is accomplished. Whoever then annuls one of the least of these commandments, and teaches others to do the same, shall be called least in the kingdom of heaven; but whoever keeps and teaches them, he shall be called great in the kingdom of heaven." (Matthew 5:18-19, NASB95)

The verse opens the Sermon-on-the-Mount's hermeneutical-foundation section (Matt 5:17-48), which precedes the famous "antitheses" ("You have heard that it was said... but I say to you..."). Matt 5:17 functions as the interpretive key for the entire Sermon-on-the-Mount and for the broader question of how Jesus's teaching relates to the Mosaic Torah. The verse is one of the most-debated single sentences in NT-and-OT-relationship literature, and the foundation text for nearly every Christian-theological framework on Christ-and-Law.

Setting

Speaker: Jesus of Nazareth.
Audience: The "crowds" and his disciples on the mountain (Matt 5:1-2); a mixed Galilean Jewish crowd that would have heard the verse in the context of contemporary debates about the proper interpretation of the Mosaic Law (the various Rabbinic schools, the Pharisaic / Sadducean / Essene divisions, the question of what counts as faithful obedience).
Location: A mountainside in Galilee, traditionally identified as the Mount of Beatitudes near the northwestern shore of the Sea of Galilee.
Time period: Early in Jesus's Galilean ministry, c. AD 27-28; precedes the major Jerusalem confrontations.

Theological reading

The verse is the single most-important hermeneutical key for the Christ-and-Law question in Christian theology. Three structural moves carry the weight:

1. The negative claim, "I did not come to abolish"

Greek: Μὴ νομίσητε ὅτι ἦλθον καταλῦσαι τὸν νόμον ἢ τοὺς προφήτας, "Do not think that I came to abolish the Law or the Prophets."

The verb katalyō (G2647), "to break down, destroy, dissolve, abolish", would name a radical-discontinuity reading of Jesus's relationship to the Torah. Jesus explicitly REJECTS this reading. Whatever His teaching does, it does NOT abolish / dissolve / break down the Law and Prophets. This forecloses several historically-important misreadings:

Marcionism (2nd c., Marcion of Sinope), the heresy that the OT-God and the Mosaic Law are evil / inferior / discarded by Jesus. Matt 5:17 directly refutes this; Christianity has never taught this.
Antinomianism, the view that Christians are bound by NO moral-ethical norms because Christ has "abolished" the Law. Matt 5:17 + the immediate context (vv. 18-19, "not the smallest letter or stroke shall pass from the Law") directly refute this.
Dispensational-supersessionism in its hardest form, the view that the OT is a closed dispensation entirely replaced by NT-Christianity with no continuity. Matt 5:17 + the strong continuity-statements in vv. 18-19 require a more nuanced position.

2. The positive claim, "but to fulfill"

Greek: ἀλλὰ πληρῶσαι, "but to fulfill."

The verb plēroō (G4137) is the load-bearing term, and its semantic range is decisive. Plēroō means "to fill up, complete, accomplish, fulfill, realize, give the full meaning of." Five distinct semantic possibilities are exegetically defensible (and Christian-theological traditions divide on which is primary):

Prophetic-fulfillment reading: Jesus fulfills the OT by being the One the OT prophesied / typified / pointed to. The Law and Prophets find their telos in Him (cf. Luke 24:27, "beginning with Moses and with all the prophets, He explained to them the things concerning Himself in all the Scriptures").
Eschatological-completion reading (R.T. France The Gospel of Matthew NICNT 2007): Jesus brings to its eschatological completion what the Law and Prophets pointed toward as a redemptive arc. The Law-and-Prophets-as-revelatory-trajectory finds its consummation in Him.
Doing-the-Law-perfectly reading: Jesus fulfills the Law by perfectly obeying it, providing the active-obedience component of His substitutionary work (Reformed-Lutheran emphasis; Rom 5:19).
Establishing-the-Law's-true-meaning reading (Sermon-on-the-Mount-internal): Jesus reveals the FULL ethical demand of the Torah, not a replacement but the true depth ("You have heard that it was said 'do not murder'... but I say to you that everyone who is angry with his brother...", vv. 21-22). The antitheses INTENSIFY the Law's ethical demand, not relax it.
Inaugurating-the-New-Covenant reading (Don Carson Matthew EBC 2010; Thomas Schreiner 40 Questions about Christians and Biblical Law 2010): Jesus fulfills the Law by inaugurating the New Covenant in which the Mosaic-judicial code is superseded but its underlying moral principles are preserved and reframed in Christ-centered ethics (cf. Christians Not Under Mosaic Law).

These five readings are not mutually exclusive; the strongest exegetical position holds that Matt 5:17's plēroō is doing several of them simultaneously. The verse signals a fulfillment-relationship that is BOTH continuous (the Law-and-Prophets are not abolished but completed) AND transformative (the New Covenant inaugurated by Jesus reframes how the OT functions for the Christian community).

3. The continuity-and-discontinuity tension

The Christian theological tradition has produced three major frameworks for handling Matt 5:17 and the broader Christ-and-Law question:

Three-fold division of the Law (Aquinas ST I-II q.99-104; Calvin Inst. 4.20; Westminster Confession 19): the Mosaic Law is divided into (a) MORAL law (the Decalogue + general ethical principles, permanently binding); (b) CIVIL/judicial law (Israelite-state-specific governance laws, ceased with the OT theocracy); (c) CEREMONIAL law (sacrificial / dietary / cultic laws, fulfilled and abolished in Christ). Matt 5:17's "fulfillment" applies differently to each category: moral (intensified), civil (typological), ceremonial (fulfilled-and-abolished). This is the dominant Reformed-Catholic-Lutheran framework.
New-Covenant-fulfillment / Reformed-Baptist (Mt Sinai → Mt Calvary covenant-shift; Heb 8-10 explicit articulation): the entire Mosaic legal-system is fulfilled in Christ; Christians live under New-Covenant ethics derived from the OT-moral-content but not under the Mosaic-legal-form. Calls "the Law" in the broader theological-typological sense rather than the dividing-into-three-categories sense.
Dispensational-supersession (classical dispensationalism, Scofield, Chafer, Ryrie): the Mosaic Law as a unified system was given to Israel only and ceased with the cross / inauguration of the Church-age; Christians are under "the law of Christ" (Gal 6:2) rather than the Mosaic Law. Matt 5:17's plēroō terminates the legal system while preserving its moral-ethical instruction-value.

The codex's policy is to present the major positions fairly without picking winners. All three frameworks are exegetically defensible; Christians divide on which best fits the broader NT-Mosaic-Law literature (cf. Romans 7-8; Galatians 3-4; Hebrews 7-10; Acts 15).

4. Apologetic deployment

Matt 5:17 is one of the most-frequently-deployed verses in apologetic engagements:

Anti-Marcionite / anti-anti-Semitic-OT-rejection deployment: When opponents claim "Christianity throws away the Old Testament" or "the OT-God is different from Jesus," Matt 5:17 is the explicit refutation from Jesus's own mouth. He came to fulfill, not abolish.
Anti-Hebrew-Israelite / anti-Sabbatarian / anti-Messianic-Jewish-Mosaic-binding deployment: When opponents claim "Christians must keep the Mosaic Law" (Sabbath observance, dietary laws, festivals, etc.), the fulfillment sense of plēroō + the broader NT context (Acts 15 Jerusalem Council; Rom 7:6, "we have been released from the Law"; Col 2:14, "having canceled out the certificate of debt consisting of decrees against us") establishes that Christians are under the New Covenant, not the Mosaic legal-form.
In dialogue with Hebrew Roots Movement: cf. Christians Not Under Mosaic Law for the broader synthesis. Matt 5:17 is the Hebrew Roots proof-text for Mosaic-binding-on-Christians; the plēroō exegesis (esp. readings 1, 2, 5 above) is the Christian rebuttal.
In dialogue with hardcore atheist OT-rejection (cf. Animal Sacrifice Objection, Mosaic Capital Punishment): Matt 5:17 establishes the Christian theological position that the OT is fulfilled, not abolished as morally bankrupt. The atheist who reads "Christians have moved beyond the OT" misreads the relationship; Christianity reads the OT through the Christ-fulfillment lens, retaining its theological content while reframing its application.

Patristic and Reformation reception

Origen (Comm. on Matthew + Hom. on Numbers 9-10), develops the typological-fulfillment reading; the OT is understood as type / shadow that finds its substance in Christ.
John Chrysostom (Hom. on Matthew 16), extensive treatment; Jesus's plēroō means He brings the Law to its full meaning + obeys it perfectly + reveals its ultimate intent.
Augustine (Contra Faustum, anti-Manichean polemic; De Sermone Domini in Monte), central deployment against Marcionism / Manichaeism; Jesus does NOT abolish the OT; the OT-God is Jesus's Father.
Aquinas (ST I-II q.107 a.2, explicitly: "the New Law fulfills the Old Law"; the three-fold division articulated in q.99-104). Foundational scholastic articulation of the moral / civil / ceremonial framework.
Luther (Lectures on Galatians 1535, Christ as the finis legis / end-and-purpose of the Law), Lutheran emphasis on Law-Gospel distinction; the Law's accusing function is fulfilled in Christ.
Calvin (Inst. 2.7-11, extensive treatment of the Law's three uses + the Christ-fulfillment relationship; Comm. on Matthew 5:17, "Christ came not to abolish the Law but to confirm and accomplish its true meaning"). Foundational Reformed treatment of the three-fold division.
Modern: Don Carson (Matthew EBC 2010); R.T. France (Matthew NICNT 2007); Thomas Schreiner (40 Questions about Christians and Biblical Law 2010); Brandon Crowe (The Last Adam 2017, Christ as the new Israel who fulfills what Israel could not).

Key words (Greek)

abolish, καταλύω / katalyō (G2647): "to break down, destroy, dissolve, abolish, demolish." Used of physical demolition (Matt 24:2, of the temple) and of legal-systemic dissolution. The verb Jesus explicitly REJECTS as a description of His relationship to the Law.
fulfill, πληρόω / plēroō (G4137): "to fill up, complete, accomplish, fulfill, realize, give full meaning of." The load-bearing term; semantic range supports multiple complementary readings (prophetic-fulfillment, eschatological-completion, perfect-obedience, true-meaning-revelation, New-Covenant-inauguration). Used elsewhere of prophecy fulfillment (Matt 1:22; 2:15, 17, 23 etc., the Matthean plēroō-formula); Jesus's death (John 19:28); Spirit-filling (Eph 5:18).
Law, νόμος / nomos (G3551): "law, principle, regulation." Translates Hebrew tôrāh; in Matt 5:17 the construction ton nomon ē tous prophētas ("the Law or the Prophets") is shorthand for the full Hebrew Scriptures (Tanakh), the entire OT-revelation, not just the legal-corpus.
Prophets, προφήτας / prophētas, accusative plural of prophētēs (G4396): "prophet, spokesperson." Together with nomos names the second division of the Tanakh (Nevi'im); the construction is Jewish-conventional shorthand for the Hebrew canon.

Cross-references

Romans 10.4, "Christ is the end (telos) of the Law for righteousness to everyone who believes", Pauline companion text on Christ-and-Law relationship
Hebrews 8.13, "In speaking of a new covenant, He treats the first as obsolete", covenant-transition framework
Galatians 3.24-25, Law as paidagōgos (tutor / disciplinarian) leading to Christ; we are no longer under the paidagōgos
Hebrews 7.18-19, "the former commandment is set aside because of its weakness... a better hope is introduced"
Acts 15.10-11, Jerusalem Council; the Mosaic-circumcision-and-law-keeping requirement is explicitly NOT imposed on Gentile Christians
Luke 24.27, 44, "He explained to them the things concerning Himself in all the Scriptures", companion Christ-fulfilling-OT text
Romans 7.6, "we have been released from the Law... so that we serve in newness of the Spirit"