A Sermon on Genesis 2:18-25 was delivered on April 19, 2026. Visit our Sermon Archives for more sermons in this series.
Context: This is the second sermon in a series on marriage. Last week defined love; this week goes back to the very beginning — before sin entered the world — to answer the question: what is marriage? The starting point matters because our culture has buried the biblical definition under layers of expressive individualism, where marriage exists mainly to affirm who I am and what I want.
The Setup: Adam and the Helper
God declares it “not good” for Adam to be alone. He parades the animals before Adam — likely in pairs — and Adam himself reaches the same conclusion: nothing in creation completes what he needs. So God creates woman from Adam’s rib, and God himself plays the role of the father of the bride, bringing Eve to Adam. Adam’s response — “bone of my bones, flesh of my flesh” — expresses total completion. Everything he needed, he now has.
The word “helper” appears 16 of 19 times in the Old Testament, referring to God helping Israel, so it carries no sense of inferiority. It signals equal dignity with a different role. The woman complements the man in the sense of completing what humanity needs to bear the image of God and exercise dominion over creation.
Three Defining Characteristics of Marriage
1. Marriage is Exclusive
“A man shall leave his father and his mother.” Marriage creates a fundamental shift — in priorities, loyalty, and accountability. The spouse now comes first. The parent-child relationship doesn’t disappear, but it changes significantly. As one father put it to his son: “You still have to listen to my advice — you just don’t have to take it anymore.”
Exclusivity also means forsaking all other options entirely. As Tim Keller observed, couples who say “I don’t need a ceremony to prove my love” are really saying “I love you, but not enough to eliminate all other options.” The prevalence of no-fault divorce shows that many people enter marriage still keeping their options open, which directly contradicts what marriage actually is. Children also need to understand this: they matter deeply, but they should not occupy the central place in the home that belongs to the husband-wife relationship.
2. Marriage is a Covenant
The phrase “hold fast” in verse 24 appears elsewhere in the Old Testament to describe covenant relationships. A covenant carries two key aspects: it is a legal relationship (which is why dissolving a marriage requires a lawyer or judge), and it is a permanent relationship. Jesus himself said in Matthew 19: “What God has joined together, let no man separate.”
The practical implication: from the moment you say “I do,” divorce should be off the table. The Westminster Confession identifies two narrow exceptions — unrepentant adultery and abandonment by an unbelieving spouse. Outside those exceptions, the vow means till death do us part. Far from being oppressive, that permanence creates genuine safety, freedom, and security that no other relationship offers.
3. Marriage is Intimate
“They shall become one flesh, and they were not ashamed.” This goes far beyond the physical. It describes a total merging of life, resources, vulnerabilities, secrets, interests, and friendship. The order matters: God presents the woman, Adam receives her, they marry, and then they become one flesh. That sequence is intentional.
Over decades of marriage, genuine one-flesh intimacy develops — spouses become each other’s closest friend, their lives and interests growing together in ways that become almost inseparable.
Four Purposes of Marriage
There are three earthly purposes: mutual help and support between husband and wife, the raising of godly children (which also grows the church), and the prevention of sexual sin. The fourth and most important is spiritual: marriage models Christ’s relationship with the church.
The Deeper Point
Ephesians 5 makes this explicit — “a man shall leave his father and mother and hold fast to his wife, and the two shall become one flesh. This mystery is profound, and I am saying that it refers to Christ and the church.” Every marriage either witnesses well or poorly to that relationship. Christ pursues his bride exclusively, covenantally, and with infinite intimacy — and he loves her anyway, knowing her completely.
A Word for Single People
Singleness is not second-class. God places single people within the church body, and that community can meet the loneliness that singleness sometimes brings. Married people carry a responsibility to draw single people into their homes and their fellowship — because the church family outlasts every earthly family and extends into eternity.
Key Takeaway
Marriage isn’t about self-expression or self-fulfillment. God designed it before sin entered the world as an exclusive, covenantal, intimate union between one man and one woman — and he designed it to tell the world something true about Jesus and his love for his people. That purpose should shape everything about how we enter, conduct, and protect our marriages.
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