Last updated: 2026-05-01
Is Lust a Sin?
Quick Answer
Yes, lust is considered sin in Christianity.
Author: IsItASin Editorial Team · Last updated:
Yes, lust is considered sin in Christianity. Matthew 5:28 — 'Anyone who looks at a woman lustfully has already committed adultery with her in his heart.' This is a sin matter in Christianity with clear guidance for believers.
What Christianity Teaches About Lust
Christianity considers Lust to be a sin — a subject of guidance in the biblical tradition.
Wondering what other faiths teach?
Christian Denominations: How They Differ on Lust
Catholic Church
Lust is one of the seven deadly sins. The Catechism (2351) defines lust as disordered desire for sexual pleasure apart from its procreative and unitive purposes. Jesus taught that lustful looking constitutes adultery of the heart (Matthew 5:28).
Catechism of the Catholic Church
Protestant Churches
Jesus' Sermon on the Mount (Matthew 5:28) directly addresses lust. All Protestant traditions consider lust sinful. Accountability groups and purity culture are particularly strong in evangelical circles.
Holy Bible (Protestant canon)
Eastern Orthodox
Lust is considered a passion (pathos) to be overcome through ascetic struggle. The Orthodox tradition teaches that sexual desire is good within marriage but becomes sinful when disordered. Fasting and prayer are prescribed disciplines.
Orthodox Church Tradition
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What Christianity Teaches About Lust
Christianity takes an uncompromising stance on lust. In the Sermon on the Mount, Jesus went beyond the external act of adultery to address the internal desire: looking at someone with lust is already adultery of the heart. This teaching shocked Jesus' audience and continues to challenge Christians today. The Catholic tradition classifies lust as one of the seven deadly sins because it distorts the God-given gift of sexuality, reducing a person to an object of pleasure. Protestant traditions generally agree, though they may differ on specific applications (such as whether attraction itself is lustful). The Christian answer to lust is not repression but redirection — channeling sexual desire into marriage and cultivating purity of heart through prayer, accountability, and disciplines like fasting.
Biblical References
- Matthew 5:28 — 'Anyone who looks at a woman lustfully has already committed adultery with her in his heart.'
- 1 John 2:16 — 'For everything in the world — the lust of the flesh, the lust of the eyes, and the pride of life — comes not from the Father but from the world.'
- Galatians 5:16 — 'Walk by the Spirit, and you will not gratify the desires of the flesh.'
- Job 31:1 — 'I made a covenant with my eyes not to look lustfully at a young woman.'
Key Teachings
| Teaching | Scripture Reference | Practical Application |
|---|---|---|
| Anyone who looks at a woman lustfully has already committed adultery with her in his heart. | Matthew 5:28 | Guard your eyes and honor others. |
| For everything in the world | 1 John 2:16 | Guard your eyes and honor others. |
| Walk by the Spirit, and you will not gratify the desires of the flesh. | Galatians 5:16 | Guard your eyes and honor others. |
| I made a covenant with my eyes not to look lustfully at a young woman. | Job 31:1 | Guard your eyes and honor others. |
What You Should Do
- Acknowledge that lust is a struggle — honesty is the first step to freedom.
- Christian: Practice the 'flee' principle (2 Timothy 2:22). Remove triggers — unfollow accounts, install content blockers, avoid compromising situations. Find an accountability partner.
- If lust has become a compulsive pattern or addiction (especially to pornography), seek professional help. This is a recognized struggle that requires support alongside spiritual practice.
- Replace lustful habits with constructive ones: exercise, study, prayer, community service. The most effective way to break a habit is to replace it.
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Is attraction the same as lust?
No.
No. All three traditions distinguish between natural attraction (which is normal) and lust (which is disordered desire that reduces a person to an object of pleasure). Noticing that someone is attractive is not sinful. Dwelling on sexual fantasies about them is.
Is lust within marriage a sin?
All three traditions have a generally positive view of sexual desire within marriage.
All three traditions have a generally positive view of sexual desire within marriage. However, some scholars note that even within marriage, treating your spouse purely as an object of gratification without love and respect falls short of the ideal.
Can lust be forgiven?
Absolutely.
Absolutely. All three faiths teach that God forgives those who sincerely repent. The key is genuine effort to change, not perfection.
