The sermon opens from Matthew 5:21-26, the first of six topics in which Jesus, having already declared that the law will stand, now teaches his followers how to keep it. The preacher frames the whole passage within a prior conviction: Christians can approach the law without dread because Jesus has already fulfilled it, both by being the true substance of the ceremonial law — the promised Lamb of God toward which the Old Covenant sacrifices always pointed — and by living a perfect life of obedience under the law, a righteousness he now shares with his people. Because Jesus bore the covenant curses and his obedience is credited to believers, obedience is no longer a means of earning blessing but a response of gratitude. This framing matters because it means Jesus's teaching in the following verses is not a new burden but an exposure of what true, thankful obedience looks like.

Jesus quotes the sixth commandment, "you shall not murder," as it was commonly taught by the scribes and Pharisees, whom ordinary Jews depended on for the meaning of Scripture since they no longer read Hebrew and had no personal access to the text. The sermon argues that the religious teachers' summary of the commandment — do not kill, or face judgment — was not technically false but dangerously shallow, and it identifies two problems Jesus exposes in it. The first problem is that the teachers had separated the act from the heart. Because the command not to murder seemed easy to keep — unlike ambiguous commands about the Sabbath or honoring parents — it became a source of pride, proof that perfect law-keeping was achievable. But the sermon insists, appealing to Psalm 51, Jeremiah's call to circumcise the heart, and Isaiah's rebuke of a people who honor God with their lips while their hearts are far from him, that God has always demanded truth and holiness in the inward being, not merely correct outward behavior. Murder therefore does not begin with the act but with the heart, and Jesus names the root sin behind it as hatred — jealousy, wounded pride, selfish desire, greed, or revenge. The sermon works through Jesus's examples of the curse words "raka" and "moros" not as a new prohibition on specific insults but as illustrations of how hatred hides in silence, in self-righteous victimhood, or in "merely stating the obvious," and remains real sin even when it never becomes an act. Sin is likened to a fruit tree: cutting off individual fruits or branches accomplishes nothing if the root is left alive, so the hearer is pressed to examine grudges, bitterness, and contempt held quietly in the heart.

The second problem is that the religious teachers kept the horizontal relationship with other people separate from the vertical relationship with God, treating the sixth commandment merely as a matter of avoiding a death sentence rather than a matter of loving as God loves. The sermon argues that because God has loved and forgiven the believer, hatred toward another person is ultimately a problem with God himself — an implicit accusation that God's way of love is wrong. This is illustrated with a domestic story of one child cheating a sibling out of turns on an iPad: the sin against the sibling becomes, on the parent's return, a sin against the parent. In the same way, unresolved hatred toward others surfaces as unresolved conflict with God, which is why Jesus instructs worshippers who remember a broken relationship to leave their gift at the altar and be reconciled first. The sermon is careful to clarify that this does not make reconciliation with people more important than reconciliation with God — the gospel is fundamentally about God reconciling sinners to himself through Christ — but that genuine reconciliation with God necessarily produces the pursuit of reconciliation with others, echoing Isaiah 1's rejection of empty sacrifices in favor of a people who seek justice and do good.

The sermon closes by returning to the fulfillment theme: if God's law reaches into the heart, no one can be justified by law-keeping, yet believers are not left condemned, because Christ has already fulfilled the law's demands and is already declared righteous on their behalf. The call to deal with hatred at its root and to pursue reconciliation is therefore framed not as a means of earning favor but as obedience flowing from gratitude for a righteousness already given.

Bible Verses Used

• Matthew 5:21-26: The sermon's main text, in which Jesus corrects a shallow reading of the sixth commandment and calls for reconciliation before worship.

• Exodus 20:13: Identified as the source of "you shall not murder," which the religious teachers had reduced to a manageable, external rule.

• Psalm 51: Cited as David's confession that God delights in truth in the inward being, grounding the claim that God has always judged the heart, not just the act.

• Jeremiah (circumcise your heart): Used to show that outward conformity to the covenant sign must reflect an inward heart set apart for God.

• Isaiah 29:13: Quoted to show that people can honor God with their lips while their hearts remain far from him.

• 1 Samuel 16:7: Referenced for the principle that man looks on the outward appearance but the Lord looks on the heart.

• Jeremiah 17:10 / 1 Corinthians 4:5: Cited together to establish that God searches the heart and will disclose the hidden purposes within it.

• Isaiah 1:11-17: Used to argue that God rejects costly sacrifice offered alongside injustice and instead calls his people to cease evil, seek justice, and care for the oppressed.