Flee fornication, guard your marriage: God’s standard on sexual purity remains unchanged

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Teacher and education commentator Ashford Kimani, author of a commentary examining biblical teachings on sexual purity and their relevance to young people, families and society today.
  • The author argues that God’s standard on sexual purity remains unchanged despite shifting social attitudes.
  • The commentary urges young people to flee fornication and married couples to guard against adultery.
  • It calls on parents, teachers and churches to promote biblical values while offering hope through repentance and restoration.

This is my third piece on this matter, and I intend to write ten pieces in total. I do so because I believe the conversation about sexual purity is too important to be reduced to an occasional sermon or a passing social media post.

Every day, our schools, colleges, families and churches are confronted by the consequences of sexual immorality. If we truly care about the next generation, then we must speak about it consistently, honestly and compassionately.

The Bible does not treat sexual immorality as a minor weakness or a harmless lifestyle choice. From Genesis to Revelation, God establishes sexual intimacy as a sacred gift reserved for the covenant of marriage. Throughout Scripture, believers are repeatedly instructed to flee sexual immorality rather than flirt with it. The standard does not change because society has changed. God’s truth remains constant.

One striking observation from the Gospels is that Jesus reserved His strongest words for sins that destroyed lives and dishonoured God’s purpose. Sexual sin was never something He excused. When confronted with adultery, He extended mercy to the sinner but firmly declared, “Go and sin no more” (John 8:11). Mercy was never permission to continue in sin. Grace always called people to repentance and transformation.

The New Testament reinforces this message repeatedly. The Apostle Paul commands believers in 1 Corinthians 6:18, “Flee from sexual immorality.” He does not say negotiate with it, manage it or experiment with it. He says flee. Joseph in the Old Testament provides the perfect example. Faced with Potiphar’s wife’s advances, he literally ran away. Sometimes the holiest decision is simply to walk away before temptation becomes action.

The cost of sexual immorality

Today, however, many young people are told the exact opposite. They are taught that fornication is normal, expected and even necessary before marriage. Virginity is mocked as old-fashioned. Self-control is portrayed as impossible. Movies, music, social media and peer pressure constantly preach that sexual activity defines maturity. Yet the painful consequences tell a different story.

Teenagers are paying a heavy price. Unplanned pregnancies continue to interrupt education and alter the course of promising lives. Sexually transmitted infections remain a reality despite advances in medicine. Emotional wounds, heartbreak, depression, anxiety and broken trust often accompany casual sexual relationships. Many young people discover too late that while physical intimacy may last for moments, emotional consequences can linger for years.

Parents and teachers are witnessing these realities every day. Secondary schools are struggling with cases of teenage pregnancies, inappropriate relationships and students distracted from their academic goals. Colleges and universities are not immune either. Some students who entered with dreams of graduating leave burdened by broken relationships, financial strain arising from early parenthood or emotional trauma that affects their studies.

This is why teenagers must flee from fornication. The biblical instruction is not intended to deny young people happiness but to protect their future. God’s commands are never designed to imprison us; they are given to preserve our dignity, health and destiny. Purity is not punishment. It is protection.

A call to married couples

At the same time, Scripture speaks just as firmly to married people. While teenagers are warned against fornication, husbands and wives are warned against adultery. Marriage is built upon trust, faithfulness and covenant. Adultery shatters that covenant. It destroys families, wounds spouses, traumatises children and leaves lasting scars within communities.

No one wakes up intending to destroy a marriage. Adultery often begins with seemingly harmless compromises: secret conversations, emotional attachments, inappropriate texting, flirtation or unchecked fantasies. What starts as curiosity gradually becomes temptation, and temptation, if entertained, eventually becomes sin.

That is why married couples must run away from situations that invite temptation. Guard your marriage. Protect your conversations. Set healthy boundaries. Honour your spouse even when no one is watching. Faithfulness is demonstrated not only by avoiding adultery but also by refusing to entertain the path that leads to it.

Grace, truth and hope

Some argue that biblical teaching on sexuality is outdated because society has become more liberal. Yet God’s standards have never been determined by public opinion. Cultures rise and fall. Trends come and go. Technology changes. Social attitudes evolve. But truth does not expire simply because people reject it.

The Christian message is not one of condemnation but of hope. Every person has sinned in one way or another. The same Bible that calls sexual immorality sin also proclaims forgiveness through Jesus Christ for those who genuinely repent. Restoration is possible. Broken lives can be healed. Guilty consciences can be cleansed. But forgiveness should never become an excuse to continue living in deliberate disobedience.

Our generation desperately needs moral courage. We need parents who will openly discuss biblical values with their children. We need teachers who will encourage responsible decision-making. We need churches that preach both grace and truth without fear or compromise. Above all, we need young people who are willing to stand against peer pressure and choose purity, even when it is unpopular.

The choice before us is clear. Teenagers must flee from fornication. Married men and women must flee from adultery. Both instructions flow from the same loving God who desires healthy families, strong marriages and lives that honour Him.

This is not a message of shame. It is a message of warning, wisdom and hope. God always calls His people away from sin because He desires something far better for them than the temporary pleasures the world offers.

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As I continue this series over the coming weeks, my prayer is that these ten articles will spark honest conversations in our homes, schools, churches and communities. If even one teenager chooses purity, one marriage is preserved from adultery or one family is strengthened because of these reflections, then this series will have served its purpose.

The biblical command remains as relevant today as ever: “Flee from sexual immorality.” It is not merely good advice—it is God’s loving instruction for every generation.

By Ashford Kimani

Ashford is a teacher of English and Literature who writes about education and social affairs. Contact: 0722901710

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