What does adultery teach about marriage?
What does "You shall not commit adultery" teach about marital faithfulness?

The Command in Context

“You shall not commit adultery.” (Exodus 20:14)

• One of the Ten Commandments, given by God to safeguard the holiness of marriage and the stability of society.

• Expressed in the negative to forbid all sexual intimacy outside the covenant bond of one man and one woman (Genesis 2:24).


Defining Adultery

• Any physical or emotional sexual union in which at least one participant is married to someone else (Leviticus 20:10).

• Includes secret flirtations, pornography, and lustful fantasies—Jesus identifies these heart-level sins as adultery’s root (Matthew 5:27-28).


God’s Design for Marriage

• Marriage is a lifelong, exclusive covenant reflecting Christ’s union with His church (Ephesians 5:31-32).

• It is founded on:

– Covenant loyalty (Malachi 2:14)

– One-flesh intimacy (Genesis 2:24)

– Mutual love and honor (1 Peter 3:7).

• Faithfulness preserves a couple’s testimony and nurtures children in security (Deuteronomy 6:6-7).


Heart-Level Faithfulness

• Jesus pierces beyond outward actions to inward desires (Matthew 5:28).

• The command calls believers to guard:

– Eyes (Job 31:1)

– Thoughts (Philippians 4:8)

– Affections (Colossians 3:2).

• Self-control is a fruit of the Spirit (Galatians 5:22-23); He empowers genuine purity, not mere rule-keeping.


Protecting the Covenant

• Nurture oneness through regular communication, forgiveness, and shared worship (1 Corinthians 13:4-7).

• Rejoice in God-given intimacy within marriage (Proverbs 5:18-19).

• Set practical boundaries:

– Transparent technology use

– Accountability friendships

– Avoidance of tempting situations (1 Corinthians 6:18).


Consequences of Adultery

• Spiritual: Fellowship with God disrupted (Isaiah 59:2).

• Relational: Trust shattered, families wounded (Proverbs 6:32-33).

• Social: Community testimony damaged (2 Samuel 12:14).

• Eternal: Unrepentant adulterers exclude themselves from God’s kingdom (1 Corinthians 6:9-10), though sincere repentance receives full pardon (1 John 1:9).


Living Out Faithfulness Today

• Cherish God’s Word as your standard (Psalm 119:9).

• Cultivate gratitude for your spouse (Ephesians 5:20).

• Pray together, inviting God to be the center of your union (Ecclesiastes 4:12).

• Remember that marriage pictures the gospel—Christ will never betray His bride (Hebrews 13:5).


Scriptures for Further Meditation

Hebrews 13:4

Matthew 19:4-6

1 Thessalonians 4:3-5

Proverbs 5:15-21

Psalm 51

How can we apply 'You shall not murder' in our daily interactions today?
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