Two Becoming One: God's Design For Covenant Marriage
There is something in the human heart that longs for belonging. We feel it early in life, and we carry it with us into adulthood. We want to be known and still be loved. We want a companion for the journey, someone who will stand with us when the road is smooth and when it is hard. That longing is not accidental. It is not a product of culture or sentiment. According to the Bible, that longing was placed in us by God himself, and in the covenant of marriage, God provides one of his most profound answers to it.
This morning we are going to open two passages of Scripture together. The first is from the very beginning of the Bible, in Genesis 2. The second is from the New Testament letter to the Ephesians, chapter 5. These two texts, separated by centuries, speak with one voice about what marriage is, what it is for, and how it is sustained. Whether you are married, hoping to be married someday, or simply a follower of Christ who wants to understand God's design for human life, this Word is for you.
The Foundation: What God Said In The Beginning
Genesis 2:18 opens with a statement that stops us in our tracks. The Lord God had just finished creating the heavens and the earth, the seas and the sky, the animals and the man. And then, in the middle of a creation that God had repeatedly called good, he says something is not good. "It is not good for the man to be alone. I will make a helper corresponding to him." That word translated helper in the CSB is the Hebrew word ezer. It is a word of strength, not subordination. The same word is used in the Psalms to describe God himself as the helper of Israel. God is not fashioning someone lesser. He is fashioning someone essential.
What follows is one of the most intimate moments in all of Scripture. God forms the woman from the man's own side. When the man sees her, he breaks into what may be the Bible's first poem: "This one, at last, is bone of my bone and flesh of my flesh." There is recognition here, and delight. He sees in her someone who corresponds to him, someone who is like him and yet distinct from him, someone who completes what was incomplete. And then the text gives us the divine commentary in verse 24: "This is why a man leaves his father and mother and bonds with his wife, and they become one flesh."
Three things are happening in that one verse. There is leaving, which means a new primary loyalty is formed. There is bonding, which translates a Hebrew word that means to cling, to hold fast, to be devoted. And there is becoming one flesh, which speaks to a union that is physical, emotional, and covenantal. Marriage, from the very beginning, is not a social arrangement or a legal convenience. It is a covenant of belonging, designed by God, rooted in his own creative act.
The Shape: What Paul Teaches In Ephesians 5
Now we move forward to Ephesians 5, where the apostle Paul takes this Genesis foundation and builds on it with the full light of the gospel. And the first thing we must notice is where Paul begins. He does not begin with husbands and wives. He begins in verse 21 with mutual submission: "submitting to one another out of reverence for Christ." That is the atmosphere in which everything else in this passage breathes. Christian marriage is not a power structure. It is a community of mutual deference, shaped by the fear and love of Christ.
From that foundation, Paul addresses both spouses with specific and weighty instruction. He calls wives to submit to their husbands as to the Lord, and he calls husbands to love their wives as Christ loved the church and gave himself up for her. We must not flatten either of these commands. The submission Paul describes is not passive silence or the surrender of personhood. It is the willing, grace-shaped ordering of a relationship in which both partners are already committed to one another's good. And the love Paul calls husbands to is not affection alone. It is sacrificial, costly, self-giving love. The standard Paul sets for husbands is the cross of Jesus Christ. That is not a standard any husband reaches by his own strength. It is a standard that drives every husband to his knees in dependence on God.
Paul's point, taken whole, is that Christian marriage is a living picture of the relationship between Christ and his church. The church is loved, cherished, cleansed, and presented holy by Christ. The church responds to that love with trust and devotion. When a husband and wife live out this pattern together, their marriage becomes a kind of sermon, a visible proclamation of the gospel to everyone around them.
What This Means For Us
So what does this mean for those of us sitting here today? Let me offer three concrete truths that flow from these texts.
First, marriage is a covenant, not a contract. A contract is conditional. It says, I will hold up my end as long as you hold up yours. A covenant is unconditional. It says, I am bound to you by promise, not by performance. When the Scriptures describe God's relationship with his people, they use the language of covenant, and that is the same language they use for marriage. Covenant love endures through seasons of difficulty, disappointment, and change, not because the feeling never fades, but because the promise was made before God and is sustained by his grace.
Second, marriage requires daily, active love. The love Paul describes in Ephesians 5 is not a feeling that either spouse either has or does not have. It is a practice, a discipline, a choice made again and again. Nourishing and cherishing, the words Paul uses in verse 29, are words of ongoing, attentive care. They describe someone who pays attention, who tends to the other person the way a gardener tends to something living and valuable. This kind of love does not happen by accident. It is built in the ordinary moments of a shared life, in honesty, in forgiveness, in choosing the other person's flourishing over your own comfort.
Third, no marriage can sustain itself on human effort alone. Paul's vision for marriage is breathtaking in its beauty, and it is also humbling in its demand. No two people, however well-suited or deeply committed, can live out Ephesians 5 by willpower. The grace that makes covenant love possible is the same grace that saves us. It flows from the cross of Christ, and it is received through faith, prayer, the reading of Scripture, and the life of the local church. Marriages that thrive are marriages that stay connected to the source of grace.
A Word For Every Person Here
If you are married, I want to encourage you today. The vision God has for your marriage is not a burden. It is a gift. It is an invitation to something richer and deeper than what the world offers. And if your marriage has been hard, if you have fallen short of this vision, the gospel has a word for you too. There is forgiveness at the cross. There is grace for fresh starts. There is help available, through prayer, through Scripture, through trusted pastors and counselors, for those who are willing to seek it.
If you are not married, this passage is still for you. It tells you something true about God. It tells you that the God who looked at the man in the garden and said it is not good for him to be alone is a God who cares about human longing and human belonging. And it points you to the deepest belonging of all, the union between Christ and his church, which is the reality that every marriage is only a picture of.
That union is available to every person here through faith in Jesus Christ. He gave himself for his people. He loves with a love that does not fail. And he invites every one of us, married or single, into a covenant relationship with himself that will outlast every earthly bond.
May God grant us grace to receive his design for marriage with gratitude, to live it out with faithfulness, and to find in it a reflection of his own great love for us.
Sources Consulted
Hamilton, Victor P. The Book of Genesis, Chapters 1-17. New International Commentary on the Old Testament. Eerdmans, 1990.
Thielman, Frank. Ephesians. Baker Exegetical Commentary on the New Testament. Baker Academic, 2010.
Stott, John R. W. The Message of Ephesians. The Bible Speaks Today. InterVarsity Press, 1979.
Wenham, Gordon J. Genesis 1-15. Word Biblical Commentary. Word Books, 1987.
Merkle, Benjamin L. Ephesians. Exegetical Guide to the Greek New Testament. B&H Academic, 2016.
Before preaching: verify every biblical reference, adapt every application to the real congregation, and revise the message in your own Christian tradition and pastoral voice.