- [00:00:00] Every Sunday morning, I receive a notification on my phone summarizing my weekly screen time usage. It’s always a sobering reminder—never quite what we hope for—and yet, each week we resolve to do better. But what actually happens when we scroll endlessly or chase the next image or video? - [00:00:25] There is a deeper reality at work in our hearts and minds. My daughter, who studies medicine, recently shared with me that she’s been studying neuropsychology and the impact of neuroscience on behavior. We talked about the amygdala and dopamine—two key players in how our brain responds to screen time. - [00:00:54] When we experience excitement or pleasure, the amygdala activates and dopamine is released. Our brains learn to associate pleasure with what we see, building neural pathways through a reward system tied to these chemicals. - [00:01:41] Researchers have found that repetitive, fast-paced stimuli like scrolling or clicking rewire our brains to prioritize intensity over intimacy, novelty over commitment, and pleasure over patience. - [00:02:08] What once shocked or tempted us loses its power; what was once wrong begins to feel normal. This is not accidental, but the formation of desires. The tech industry understands this and designs apps not just to inform but to shape and disciple our desires. - [00:02:50] This raises a profound question: if our hearts are daily trained by systems built on instant gratification, how do we live righteously and pursue holiness in God’s kingdom that calls for purity of heart? Today, in our series *Idols of the Heart*, we focus on the purity of the heart, confronting the idol of pleasure, specifically lust. - [00:03:47] Lust, simply put, is disordered love that corrupts the heart, destroys the soul, and fractures covenant relationships. - [00:04:18] After the Beatitudes, Jesus, in Matthew 5, addresses not just external behavior but the root of desires. He declares that true righteousness exceeds that of the Pharisees, who focused only on outward compliance, by addressing the heart’s intentions—particularly in relation to adultery. - [00:05:15] Jesus expands the understanding of the commandment against adultery, calling us to a holiness that is concerned with our hearts, not just actions. We will examine three themes: love and lust, life and lust, and marriage and lust. - [00:06:05] Matthew 5:27-28 says, “You have heard that it was said, ‘You shall not commit adultery.’ But I say to you, that everyone who looks at a woman with lustful intent has already committed adultery with her in his heart.” - [00:06:35] Adultery is the breaking of God’s covenant for marriage between one man and one woman. Marriage is designed by God as a covenantal love reflecting His covenant with us. Scripture repeatedly warns us to keep the marriage bed pure. - [00:07:23] Love, contrary to popular culture’s definition as mere feeling, is a committed choice rooted in covenant. We will love our spouses not for fleeting beauty or strength, which will fade, but because we have willed to love them. - [00:08:30] An article I read maps the timeline of life and relationships, showing that in later years, if married, we spend the most time with our spouse. This underscores the importance of investing in marriage. God uses marriage, even its conflicts, as a means of sanctification. - [00:09:23] Defining marriage as only feelings leads to instability. Today, my wife and I celebrate 26 years of marriage—though our day started with conflict. Yet, the covenant we made before God and the church draws us back to love and unity despite our flaws. - [00:10:19] Returning to Matthew 5:28, Jesus focuses on the heart’s desire—lust. The Greek word *epithumia* means an intense passion or longing. It is a neutral word used both positively (longing for God or good things) and negatively (coveting or sinful desire). - [00:12:32] Jesus combines the sixth commandment (do not commit adultery) with the spirit of the tenth commandment (do not covet). Coveting in its sinful form is an unrestrained desire that seeks to take what is not ours, regardless of God’s will. - [00:13:32] Lust is unrestrained, impure love—feelings without guardrails, seeking pleasure without boundaries. It often arises from boredom, desire for more pleasure, or escapism under stress. King David’s grievous sin of adultery began in boredom, reminding us to guard our idle moments carefully. - [00:14:48] Jesus teaches that adultery begins in the mind, not just in action. It follows patterns: recalling past pleasures, scheming for future ones, or fantasizing. Men often struggle with visual stimuli; women often with emotional comparisons. Lust seeks pleasure meant only for marriage outside of it. - [00:16:14] We live in an era saturated with desire—dating apps exploit *epithumia* by encouraging immediate, intense visual desire. Culture tells us desire justifies itself, but Jesus corrects this: desire itself is not sinful; disordered desire is. - [00:17:12] For married couples, lust is often a slow drift—small comparisons, emotional connections outside the marriage, fantasies replacing intimacy. The solution is not trying harder but returning to covenant commitment. Ask: Am I investing my emotional energy in my spouse or elsewhere? - [00:18:12] Parents must also recognize that children are being discipled by digital media daily. Screen time shapes their *epithumia* and desires. It is essential to have honest conversations and set boundaries to disciple desires, not merely monitor behavior. - [00:19:04] Jesus then warns in Matthew 5:29-30 that if a part of the body causes sin, it is better to remove it than to lose eternal life. This radical language illustrates the severity of lust’s threat—not just to behavior but to our eternal destiny. - [00:21:16] The Bible does not say to resist temptation by standing firm but to flee. Removing access to sin’s pathways—whether through media, relationships, or habits—is vital. John Owen exhorts us to attack sin at its first stirring, before it gains momentum. - [00:23:11] Practically, identify one habitual pathway feeding lust—one account, one app, one habit—and cut it off decisively. This is not about personal strength but obedience to Christ’s call for radical spiritual surgery. - [00:24:46] Parental supervision is not optional; it is spiritual warfare. We must disciple not only behavior but desires. Set family digital boundaries, establish screen-free times, and openly discuss God’s design for love and sexuality. - [00:25:43] Lust has real consequences: it can destroy souls and disrupt covenant relationships. Jesus addresses divorce in Matthew 5:31-32, warning that divorce except for sexual immorality leads to adultery. The Old Testament regulated divorce but did not approve it lightly. - [00:27:38] The Pharisees’ debates on divorce illustrate the tension between rigor and laxity. Today, divorce is often treated casually, even in the church, with many stemming from broken covenant due to lust or disordered desires. - [00:28:48] The antidote to lust is love—true, covenantal love empowered by the Spirit. Galatians 5:16 exhorts us to walk by the Spirit to not gratify fleshly desires. Romans 6 calls us to consider ourselves dead to sin and alive to God. - [00:30:54] John Owen’s *Mortification of Sin* offers profound guidance on combating lust: honestly diagnose sin’s symptoms, feel the weight of guilt, refuse to minimize sin, desire deliverance intensely, know your temperament, cut off opportunity, attack sin early, meditate on God’s holiness, and seek peace through obedience. - [00:34:55] Owen’s summary is stark: *“Be killing sin or it will be killing you.”* Mortification is daily, Spirit-empowered warfare, not optional or seasonal. - [00:35:48] Lust is disordered love, not absence of love. The cure is not less desire but desire rightly ordered toward God, who made us for Himself. Even if we fall, hope remains in Jesus, who enables repentance and freedom through His grace and the means of grace: Word, prayer, community, accountability, and the sacraments. - [00:36:58] Jesus models this perfect reorientation of desire in His wilderness temptation. He refuses to satisfy immediate pleasure or power, declaring, “Man shall not live by bread alone but by every word from God.” His pleasure is found in the Father’s love, which is higher and more satisfying than any earthly craving. - [00:38:26] Although Jesus commands radical measures against sin, He bore our failings on the cross—His hands and feet pierced, forsaken by the Father—demonstrating the profound love that secures our forgiveness and sanctification. - [00:39:52] Therefore, let us find our pleasure and reorient our hearts in the love of Christ. For those married, guard your hearts and marriages by nurturing covenant love daily—pray together, speak covenant language, fight for your marriage, address dissatisfaction early, and guard against emotional drift and comparison. - [00:41:22] Remember once again John Owen’s exhortation: *“Be killing sin or sin will be killing you.”* But more importantly, the power to do so comes not from ourselves but from Christ, who was killed in our place and whose love provides the utmost and lasting pleasure. Amen. The sermon YouTube and Spotify images are attached