How to Use This Commentary
Matthew 5:27–30 is Jesus’ second example of the deeper righteousness He described in Matthew 5:17–20. Read it in three movements: (1) the command against adultery, (2) the heart-level sin of lust, and (3) the radical seriousness of fighting sin.
Key: Jesus does not merely address outward sexual sin—He exposes the inward desires that give birth to it.
Jesus moves from murder to adultery—but He keeps pressing the same point.
God’s righteousness is not merely about what your hands do.
It is also about what your heart wants.
The religious leaders could say:
👉 “I have not committed adultery.”
But Jesus says:
👉 “What have you allowed your eyes to desire?”
The issue is not only sexual behavior.
The issue is worship, desire, and the direction of the heart.
A Quick Look: Matthew 5:27–30
Big idea: Jesus teaches that lust is adultery of the heart, and His followers must deal seriously with whatever leads them into sin.
Why this matters: Sexual purity is not only about avoiding physical acts. It begins with guarding your heart, eyes, desires, and imagination.
Key truth: Sin must not be managed casually. It must be fought decisively.
Bottom line: Jesus calls His disciples to pursue purity from the inside out.
A Simple Explanation (Matthew 5:27–30)
“You have heard that it was said, ‘You shall not commit adultery’” (v.27)
Jesus quotes the seventh commandment.
Meaning: God has always cared about the holiness of marriage and sexual faithfulness.
Application: Sexual sin is not small because marriage is not small.
“But I say to you…” (v.28)
Jesus goes deeper than outward behavior.
Meaning: He is not contradicting the Old Testament—He is exposing the heart-level meaning of God’s command.
Application: You can avoid physical adultery and still be guilty of adultery in your heart.
“Everyone who looks at a woman with lustful intent…” (v.28)
Jesus is not condemning noticing beauty or experiencing temptation.
Meaning: He is confronting the deliberate, lingering look that desires sexual sin.
Application: Purity means refusing to turn another person into an object for selfish desire.
“Tear it out…cut it off…” (v.29–30)
Jesus uses shocking language to show how seriously we should fight sin.
Meaning: He is not commanding physical self-harm, but radical action against temptation.
Application: Whatever pulls you toward sin must not be treated casually.
Bridge: Jesus is not calling us to perform outward purity while hiding inward corruption. He is calling us to become pure in heart.
A Deeper Dive: Lust, Purity, and the Battle for the Heart
1) This Passage Continues Jesus’ Heart-Level Righteousness
Matthew 5:27–30 follows the same pattern as Matthew 5:21–26. Jesus takes a command many people reduced to external behavior and shows that God’s concern reaches the heart.
Insight: In Matthew 5:21–26, anger is the root of murder. In Matthew 5:27–30, lust is the root of adultery.
2) Jesus Is Not Lowering the Standard—He Is Revealing It
Some people assume Jesus makes obedience easier by replacing Old Testament law with something softer. But Matthew 5 shows the opposite.
Jesus does not say, “The commandment against adultery no longer matters.” He says the commandment goes deeper than many imagined.
Insight: Jesus does not relax God’s standard. He reveals the full depth of it.
3) The Commandment Against Adultery Protects More Than Behavior
“You shall not commit adultery” protects marriage, covenant faithfulness, sexual holiness, and the dignity of people made in God’s image.
Adultery is not merely a private act between consenting adults. It violates covenant, damages trust, dishonors God’s design, and treats another person as a means of self-gratification.
Insight: Sexual sin is never merely physical because people are never merely physical.
4) What Kind of “Looking” Is Jesus Condemning?
Jesus is not condemning the first glance, the recognition of beauty, or the experience of temptation itself.
He is condemning the intentional look that keeps looking in order to fulfill one’s desires.
The issue is not accidental sight but cultivated desire.
Teaching line: Temptation may appear at the door, but lust invites it inside.
5) Lust Turns People Into Objects
Lust is not love. Love seeks another person’s good before God. Lust uses another person’s body or image for selfish pleasure.
This is why Jesus treats lust so seriously. It does not merely corrupt the one who looks. It also devalues the one being looked at.
Insight: Lust trains the heart to consume people instead of love them.
6) The Heart Is the Battlefield
Jesus’ words expose the real battlefield of sexual purity. The battle is not only fought in actions but in imagination, attention, desire, and secrecy.
Many people want external purity without internal surrender. Jesus will not allow that.
Insight: You cannot walk in purity while feeding impurity in the heart.
7) “Adultery in His Heart” Shows the Seriousness of Desire
Jesus does not say lust is identical in consequence to the physical act of adultery. But He does say lust belongs to the same sinful root.
Physical adultery is the fruit. Lust is the seed.
Insight: God judges not only what we do with our bodies but what we cherish in our hearts.
8) The Radical Language of Eye and Hand
When Jesus says to tear out the eye or cut off the hand, He uses vivid, shocking language to show the seriousness of sin.
He is not commanding physical mutilation. A person could remove an eye or hand and still have an impure heart.
Meaning: Jesus is calling for decisive action against whatever becomes an avenue for sin.
9) Radical Repentance Is Better Than Comfortable Destruction
Jesus says it is better to lose what feels valuable than to keep it and be destroyed.
That means disciples must be willing to remove access, habits, patterns, entertainment, apps, relationships, or private compromises that feed sin.
Teaching line: If something is helping sin grow, it is not your friend.
10) Fighting Sin Is Not Legalism
Some people mistake radical obedience for legalism. But Jesus is not teaching that we earn salvation by cutting things out of our lives.
He is teaching that people who belong to the Kingdom take sin seriously because they belong to the King.
Insight: Grace does not make sin safe. Grace makes holiness possible.
11) This Passage Is About More Than Sexual Sin
While Jesus is directly addressing lust and adultery, the principle applies broadly:
- Take sin seriously
- Do not negotiate with temptation
- Remove what repeatedly leads you away from God
- Choose holiness over comfort
12) Gospel Hope for the Impure
Matthew 5:27–30 exposes us, but it does not leave us hopeless.
Jesus is the only perfectly pure person who ever lived. He fulfilled the righteousness we lack, died for the sins we have committed, and gives new hearts to those who trust Him.
Insight: Jesus does not merely forgive impure people—He makes them new.
13) What Obedience Might Look Like Today
This passage may call for specific, practical steps:
- Confessing hidden sin to God
- Seeking accountability with a mature believer
- Removing access to pornography or tempting content
- Changing entertainment patterns
- Refusing flirtation that feeds desire
- Honoring people as image-bearers, not objects
- Praying for a pure heart, not just cleaner habits
Teaching line: Jesus does not call you to manage lust quietly. He calls you to kill it decisively.
- Jesus exposes the heart-level root of adultery
- Lust is deliberate desire for sexual sin
- Purity involves eyes, imagination, motives, and actions
- Jesus calls for radical action against whatever feeds sin
- The gospel offers both forgiveness and transformation
Bottom Line (Matthew 5:27–30)
Jesus calls His disciples to fight sexual sin at the level of the heart, because true purity is not merely avoiding adultery but becoming whole-heartedly devoted to God.
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