What Does God Say About Sex? A Biblical Overview
"Marriage is honourable in all, and the bed undefiled: but whoremongers and adulterers God will judge." — Hebrews 13:4
This single verse captures the Bible's dual posture toward sex: celebration within covenant marriage and solemn warning against sexual sin Hebrews 13:4. The Greek word for 'bed' here (koitē) is explicitly physical, meaning God isn't squeamish about the subject — He's defining its proper place.
The Old Testament reinforces this boundary. Deuteronomy 23:17 commanded Israel,
"There shall be no whore of the daughters of Israel, nor a sodomite of the sons of Israel."Deuteronomy 23:17 Sexual holiness was part of Israel's distinct identity before God. Meanwhile, Romans 7:7 reminds us that the law itself names lust as sin:
"I had not known lust, except the law had said, Thou shalt not covet."Romans 7:7 God's standard isn't just behavioral — it reaches the desires of the heart.
Protestant View on What God Says About Sex
"Marriage is honourable in all, and the bed undefiled: but whoremongers and adulterers God will judge." — Hebrews 13:4
Protestant theology has consistently taught that sex is God's good creation, designed exclusively for the covenant of marriage between a husband and wife. Hebrews 13:4 is the cornerstone text: marriage is 'honourable in all,' and the marriage bed is 'undefiled' Hebrews 13:4. This means sex within marriage isn't merely tolerated — it's blessed and holy before God.
Outside of marriage, however, Scripture draws firm lines. Deuteronomy 23:17 prohibited prostitution and cultic sexual immorality in Israel, showing that God's concern for sexual ethics runs throughout both Testaments Deuteronomy 23:17. Protestant reformers like Luther and Calvin emphasized that these commands weren't ceremonial laws but expressions of God's moral character.
Romans 7:7 extends God's standard beyond actions to desires themselves — lust is named as sin by the commandment 'Thou shalt not covet' Romans 7:7. Protestant teaching, especially in the Reformed and evangelical traditions, therefore calls believers to guard not just their bodies but their minds and hearts. Sexual purity is understood as an act of worship, not mere rule-following.
It's worth noting that Genesis 3:16 shows that the fall distorted the sexual relationship between husband and wife, introducing pain, desire imbalance, and conflict into what God originally designed as harmonious Genesis 3:16. Protestant theology sees Christ's redemption as restoring the possibility of honoring God in one's sexuality.
Key takeaways
- Hebrews 13:4 declares the marriage bed 'undefiled,' affirming that sex within marriage is holy and blessed by God Hebrews 13:4.
- God judges sexual immorality — Hebrews 13:4 specifically names whoremongers and adulterers as subject to divine judgment Hebrews 13:4.
- Lust itself is named as sin by God's law in Romans 7:7, meaning God's sexual ethic reaches the heart, not just outward behavior Romans 7:7.
- Deuteronomy 23:17 prohibited prostitution among God's people, making sexual purity part of Israel's covenant identity Deuteronomy 23:17.
- Genesis 3:16 shows that the fall distorted human sexuality, introducing pain and relational conflict into what God designed as good Genesis 3:16.
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