Sermon On Marriage Vows

When You Said "I Will": The Weight and Grace of Covenant Promises

There is a moment that most of us recognize, whether we have lived it ourselves or witnessed it from a pew. Two people stand before God and a gathered community, and they open their mouths and make promises. Not suggestions. Not intentions. Promises. And the room goes quiet, because something sacred is happening. Words are being spoken that are meant to outlast the day, outlast the feelings of the moment, outlast the easy seasons and the hard ones alike.

Today we are going to let Scripture speak directly into that moment and into the long life of marriage that follows it. We are going to look at two passages that, taken together, give us a full and honest picture of what covenant promises are, why they matter, and how they are lived out day after day. The first is Ecclesiastes 5:1-5, and the second is Mark 10:6-9. Open your Bibles there, and let us begin.

The Weight Of A Vow

Ecclesiastes 5:1-5 in the Christian Standard Bible reads this way: "Guard your steps when you go to the house of God. Better to draw near to listen than to offer the sacrifice of fools, for they don't know that they are doing wrong. Don't be hasty to speak, and don't be impulsive to make a speech before God. God is in heaven and you are on earth, so let your words be few. For dreams come with much work and a fool's voice with many words. When you make a vow to God, don't delay fulfilling it, because he does not delight in fools. Fulfill what you vow. Better that you do not vow than that you vow and not fulfill it."

Those are not soft words. The Teacher in Ecclesiastes is writing to people who have a habit of making grand promises before God and then walking away as though those words dissolved in the air. And he says: do not do that. God heard you. God takes your words seriously, and so should you.

Now, Ecclesiastes is wisdom literature. It is not a marriage manual in the narrow sense. But the principle it establishes reaches directly into the marriage covenant. When a person stands before God and a congregation and says "I will love you, I will honor you, I will remain faithful to you," those words are not merely social custom. They are a vow. They are spoken in the presence of the God who is in heaven while we are on earth. The Teacher's warning applies with full force: do not be hasty to speak, and once you have spoken, do not treat your words as optional.

This is not meant to terrify anyone. It is meant to awaken us to the dignity of what a marriage vow actually is. We live in a culture that treats promises as provisional, as subject to revision whenever circumstances change or feelings shift. Ecclesiastes pushes back against that with quiet, steady force. A vow made to God is not a preference. It is not a goal. It is a commitment that carries moral and spiritual weight.

And here is the grace hidden inside that weight. When we understand how seriously God takes our words, we also begin to understand how seriously he takes his own. Every promise God has ever made stands. Every covenant he has entered has been kept. The same God who calls us to honor our vows is the God who has never broken his. That is not a burden. That is a foundation.

What God Has Joined

Now turn to Mark 10:6-9. Jesus is responding to a question about divorce, and in doing so he reaches all the way back to creation to explain what marriage is at its root. He says, "But from the beginning of creation God made them male and female. For this reason a man will leave his father and mother and be joined to his wife, and the two will become one flesh. So they are no longer two, but one flesh. Therefore what God has joined together, let no one separate."

Notice that Jesus does not begin with law. He begins with creation. He begins with the original design. Before the fall, before the complications of a broken world, God established marriage as a joining. And the word Jesus uses for "joined" carries the idea of being glued or bonded together. This is not a loose association. This is a union.

And then Jesus says something that should stop us in our tracks: "what God has joined together." Not what the couple has arranged. Not what the ceremony has produced. What God has joined. The implication is clear. When two people enter a covenant of marriage, God himself is the one who is acting. He is the one who takes the two and makes them one. The ceremony is the occasion. God is the agent.

This reframes everything. If God is the one who joins, then the marriage covenant is not primarily a legal contract between two parties. It is a covenant that involves a third party who does not step away after the ceremony is over. He remains present in that union. He is the witness, the sustainer, and the one to whom both spouses are ultimately accountable.

For those who are married, this is both a comfort and a call. A comfort, because you are not holding your marriage together by sheer willpower. The God who joined you is the God who sustains. A call, because you cannot treat your marriage as a private arrangement that concerns only the two of you. It is a covenant made before God, and he takes it seriously.

The Daily Practice Of Covenant Love

So we have the weight of the vow from Ecclesiastes, and we have the divine origin of the union from Mark. Now the question becomes practical: how does covenant love actually work in the ordinary days of a marriage?

The answer is that it works through daily choices. Not grand gestures alone, though those matter. It works through the ten thousand small decisions to keep the promise when keeping it is inconvenient, when feelings are complicated, when the other person is not easy to love in that moment.

Covenant love says: I chose you then, and I choose you now. Not because the feelings are always warm, but because the promise is still standing. Not because everything is easy, but because God is still present in this union and I am still accountable to him.

This kind of love requires honesty. It requires the willingness to say when something is wrong and to seek repair rather than distance. It requires forgiveness, not as a one-time event but as a practice. It requires the humility to be known fully and to keep choosing the other person anyway.

And it requires the local church. Marriage was never designed to be lived in isolation. The congregation gathered around a couple is not just an audience for a ceremony. It is a community of people who are called to pray for that marriage, to model faithful love in their own lives, and to offer support when the road is hard. If you are married and your marriage is struggling, the body of Christ is part of the answer. Seek wise counsel. Seek prayer. Do not try to carry it alone.

The Gospel Underneath The Covenant

There is one more thing that must be said, and it is the most important thing. The reason marriage vows carry weight is not only because God commands faithfulness. It is because marriage is designed to point to something greater. The apostle Paul, in Ephesians 5, calls marriage a mystery that reflects the relationship between Christ and the church. Christ loved the church and gave himself for her. He made a covenant with his people and he has kept it at the cost of his own life.

Every faithful marriage is a small, imperfect, but real picture of that love. And every time a husband or wife chooses to keep their promise when it would be easier to walk away, they are reflecting something of the character of Christ.

But here is the good news for every person in this room, married or not. The love that Christ has for his people is not dependent on our faithfulness. It is grounded in his. He kept the covenant when we could not. He fulfilled every promise when we had broken every one of ours. And he offers that covenant love freely, by grace through faith, to anyone who will receive it.

If you have never trusted Christ, today is the day to begin. Not because marriage requires it, though it helps. But because you were made for a relationship with the God who made you, and he has made the way open through Jesus.

And if you are married, let the covenant you have made be renewed today. Not with new words, but with a fresh commitment to the words you have already spoken. You said "I will." With God's help, you still can.

Sources Consulted

Longman, Tremper III. The Book of Ecclesiastes. New International Commentary on the Old Testament. Eerdmans, 1998.

France, R. T. The Gospel of Mark. New International Greek Testament Commentary. Eerdmans, 2002.

Garrett, Duane A. Proverbs, Ecclesiastes, Song of Songs. New American Commentary. Broadman and Holman, 1993.

Stein, Robert H. Mark. Baker Exegetical Commentary on the New Testament. Baker Academic, 2008.

Köstenberger, Andreas J. God, Marriage, and Family: Rebuilding the Biblical Foundation. Crossway, 2010.