Maybe you searched for what the seventh commandment really means because you want to know where the line is. Is it only about cheating? What about your thoughts when a person texts you late at night? “You shall not commit adultery” (Exodus 20:14) is one of the shortest commands in the Bible, yet it reaches deeper than most of us expect.
In this article, we’ll clear away common myths, explore why God treasures marriage, consider what Jesus said about the heart, and see how the gospel offers hope to anyone who has failed here.
Key Takeaways
Adultery is covenant betrayal, not just a physical act.
God designed marriage to picture his faithful love for his people.
Jesus locates adultery in the heart, and only he can give us a new one.
God made sex holy and good within marriage.
Jesus took the shame of our unfaithfulness so we could wear his perfect covering.
Myth: The Seventh Commandment Is Only About Cheating
The myth: As long as I never sleep with someone other than my spouse, I have kept this command.
The truth: In Hebrew, the command is just two words, lo tinaf, a strong “do not.” It means sexual unfaithfulness, but it also speaks of covenant betrayal: walking away from a deep personal promise.
Adultery, then, includes a deep relational bond that takes the place of a spouse. One of us learned this as a young pastor when a woman in crisis began calling late at night for comfort and emotional support. Nothing physical happened, but his wife wisely pointed out that he was stepping into a role that belonged to a husband alone. God established boundaries.
The command is also positive: Be radically faithful. Delight in your spouse. Guard your eyes, heart, and imagination, and direct every attraction toward your spouse alone.
Why Does God Care So Much About Marriage?
Our culture increasingly devalues marriage, but God holds it in high regard. The Bible opens with a wedding in Genesis 2. Jesus performs his first miracle at a wedding in Cana (John 2:1–11). And the Bible ends with the marriage supper of the Lamb (Revelation 19:7–9).
God designed marriage to illustrate his relationship with his people. Marriage is a living picture of God's covenant love, so adultery tears apart something deeply sacred to him.
A Covenant of Three
Wedding vows are not “I find you amazing.” They are “For better or worse, I will not leave you.” That promise reflects God's faithfulness. He says, “I will never leave you nor forsake you” (Hebrews 13:5), and he bound himself to us while we were still sinners.
When you marry, you enter a covenant of three, not two. God remains the head. He convicts, so you do not have to nag. He has forgiven you so much that keeping score looks foolish.
Picture a triangle. As a husband and wife move toward God, they also move toward each other.
I Love You, Period
Early in one of our marriages, after a difficult fight full of insecurity, a wife walked to a dry-erase board where she had written, “I love you because...” She crossed out “because” and put a period after “I love you.”
That is the gospel. Religion says, “Perform, and maybe you will be loved.” The gospel says, “Christ was good enough. You are loved.” A gospel-shaped marriage becomes a sanctuary where you can stand before each other fully known and safe.
What Did Jesus Mean by Adultery in the Heart?
The myth: If it never becomes action, it is not adultery.
The truth: In Matthew 5:27–28, Jesus says that anyone who looks at a woman with lustful intent has already committed adultery in his heart. The word points to a grasping appetite that says, “I wish I could have that.”
A passing glance is not the same as feeding a thought. You cannot keep a bird from landing on your head, but you can keep it from building a nest.
Jesus then says to tear out your right eye and cut off your right hand if they cause you to sin (Matthew 5:29–30). This hyperbole shows how seriously we must take sin. Your eye has no thoughts of its own. Jesus has already identified the source: the heart. By his logic, the heart has to go.
That is a call to the gospel. When David repented of adultery with Bathsheba, he did not pray for clean eyes. He prayed, “Create in me a clean heart, O God” (Psalm 51:10). Through Ezekiel, God promised this heart transplant: “I will give you a new heart, and a new spirit I will put within you” (Ezekiel 36:26).
Myth: God Is Against Sex
The myth: God's rules show that he is suspicious of sex.
The truth: God made sex enjoyable and filled it with sacred power. A husband and wife share in bringing forth an everlasting soul. That is why its misuse is so destructive.
Sex is like fire: wonderful in a grill, terrible on your couch. As Proverbs 6:27 asks, “Can a man carry fire next to his chest and his clothes not be burned?”
Studies we have shared on The Bible Show link faithful married couples with the highest sexual satisfaction, while cohabitation and pornography are associated with much higher divorce rates.
Wisdom for the Battle
Do not trust your own strength. One of us, while engaged, ended up in a hotel room with friends and a woman they had tried to set him up with. He was shocked by the strength of the pull. He left that night, called his fiancée, and drove to his brother's town. If David could fall, so can we.
Cut off the pathways to temptation. Skip the drinks that lower your guard. Use phone filters or a simpler phone. Find accountability partners. Waiting for marriage and staying faithful within it are acts of worship.
How Does God See Our Unfaithfulness?
The prophets describe idolatry as adultery. God told Hosea to love an unfaithful wife “even as the Lord loves the children of Israel, though they turn to other gods” (Hosea 3:1). Jesus called his generation “evil and adulterous” (Matthew 12:39). God is the faithful husband whose heart we break.
Yet consider how Jesus treats the woman caught in adultery in John 8. Her sin would still be punished, but Jesus would bear it himself. Then he said, “Go, and from now on sin no more” (John 8:11).
Isaiah 1:18 promises, “Though your sins are like scarlet, they shall be as white as snow.” Scarlet was associated with prostitution and shame. At the cross, soldiers took Jesus' seamless tunic (John 19:23–24), and his enemies put a scarlet robe on him (Matthew 27:28). They received his perfect covering. He took our scarlet.
What This Means for Daily Life
The seventh commandment is not a box to check. How you speak to your spouse over breakfast and what you do with your phone at night are where this theology becomes real.
Tell your spouse today, “You are my treasure, not what you provide.”
Set clear boundaries with anyone seeking emotional support that belongs to a spouse.
Remove pathways to temptation with filters and accountability.
When a tempting thought lands, hand it to God immediately.
Stop keeping score. Forgive as you have been forgiven.
If you are single, honor God with your body as an act of worship.
Reflective Questions
Where might you be giving emotional closeness that belongs to your spouse or future spouse?
Do you love those closest to you “because” or “period”?
What pathway to temptation do you need to cut off this week?
How does knowing that Jesus took your scarlet change how you carry past guilt?
Frequently Asked Questions
Is an emotional affair really adultery?
Yes. Giving another person the deep comfort and emotional support that belongs to your spouse, and returning that affection, breaks the covenant even without physical contact.
Is it lust to notice that someone is attractive?
Not by itself. Jesus speaks of lustful intent. The sin comes when you feed the thought and let it grow in your imagination.
Did Jesus want us to literally cut off body parts?
No. He used hyperbole to show how seriously we must take sin. The heart is the source, and only God can give you a new one.
Can God forgive sexual sin?
Completely. Jesus bore the punishment on the cross. He clothes us in his covering and invites us to leave both sin and guilt behind.
Friend, if you feel the weight of this command, you are not alone. We all come to God with a history we wish we could erase. But Jesus is a bridegroom who will never let you go. He willingly suffered for your sin.
If you are carrying guilt, leave it with him. If you are living in sin, leave the sin. The seventh commandment is not a fence around your joy. It is an invitation to a more beautiful and abundant life.
Run to Jesus with all of it. He is good. This week, sit down with your spouse or a trusted believer and talk honestly about one boundary you want to set. If this encouraged you, share it with someone who needs to hear that God's love comes without a “because.”
Want to partner with us and help make more content like this possible?