Matthew 13: The Kingdom Grows When You Give Your Life

Introduction

“The kingdom of heaven is like a grain of mustard seed.” Alfred Nygren, pastor of Citykyrkan in Stockholm, is continuing a series of about eight weeks on the parables of Jesus. He admits that these parables sometimes seem more mysterious than what they explain, because part of their context is missing for us. Still, he wants to look in them for what they say about God, his kingdom, and the consequences for our lives.

The message comes down to one image. The kingdom of God starts small, but it carries a force able to spread very fast. On one condition: that, season after season, someone agrees to be sown. “Wherever we are ready to lay ourselves down for someone else, the kingdom of God will break in with power.”

The pastor is speaking to a Church that sees God at work: more than a hundred people signed up for the Alpha course, young people saying yes to Jesus. But he warns that none of this happens because the Lord suddenly decides to bless the Church. It happens because people lay down their lives.

Outline of the Message

1. A Kingdom Unlike What Anyone Expected

When Jesus begins his ministry, the Jewish people have been living for about 600 years, or nearly, under various occupying powers, with only a short period of relative freedom. For 90 years, the Romans have been in charge.
The people carry a human hope, to be free, and a prophetic hope: the coming of a Messiah who would bring freedom. They live in expectation, watching for whatever will make them a free people again.
So when Jesus announces in Mark 1: “The time is fulfilled, and the Kingdom of God is at hand! Repent, and believe in the Good News,” those who hear him prick up their ears. Are we going to move from the rule of Rome to another kingdom?
Then Jesus explains this kingdom through parables, and the image is very different from what the people were hoping for: “The Kingdom of Heaven is like a grain of mustard seed, which a man took, and sowed in his field; which indeed is smaller than all seeds. But when it is grown, it is greater than the herbs, and becomes a tree, so that the birds of the air come and lodge in its branches” (Matthew 13:31-32).
The obvious point: the kingdom Jesus brings is not one more military power that takes control by force. It comes from elsewhere. It is something small that grows.

2. Why a Mustard Seed and Not an Acorn

At first glance, one might think Jesus should have picked a sturdier image. “The kingdom of God is like an acorn: once sown, it becomes a mighty oak.” That would have had some stature, wouldn't it?
The pastor checked: there are oaks in Israel, and some are more than 800 years old. An acorn is small too. But it becomes something big and far more lasting.
Yet Jesus chooses the mustard, an annual herb. The plant is sown, grows, then dies after a year, and the process starts over.
When the plant dies, it is full of tens of thousands of new seeds. Each one carries the potential to become a new plant, if it is sown and finds the right conditions.
So Jesus compares the kingdom to something small and insignificant that can become great. But also to something that can spread at great speed, if, at the end of each season, someone prepares the next one.

3. Unless the Grain Dies, It Remains Alone

Jesus uses the image of the seed several times. In John 12, he says: “The time has come for the Son of Man to be glorified. Most certainly, I tell you, unless a grain of wheat falls into the earth and dies, it remains by itself alone. But if it dies, it bears much fruit.”
He adds: “He who loves his life will lose it. He who hates his life in this world will keep it to eternal life. If anyone serves me, let him follow me. Where I am, there will my servant also be. If anyone serves me, the Father will honor him.”
Jesus is speaking first of his death and resurrection. The kingdom of God has its own rules of the game: what looks like a defeat is in fact the moment when the kingdom breaks in with decisive force.
The world sees a man losing his life; Jesus sees a grain of wheat that will bear much fruit. The world sees a defeated king; Jesus declares that the prince of this world will be thrown out. The world sees a man lifted up on an instrument of execution; Jesus declares that, through it, he will draw all people to himself.
The kingdom always seems to advance the same way: something is first planted, dies, and is buried. And Jesus gives himself as the model. Every time someone gives their life to follow Jesus, the Father honors them by making them bear fruit. We lay down our lives for the Gospel so that others may meet Jesus.

4. Smallness Also Speaks of the Power of the Gospel

“Sometimes, I think we have made smallness something reassuring.” It is comforting to tell ourselves that everything starts small. But the image also speaks of the explosive force of the Gospel: it does not take much to reach many people, if it is planted in the right place.
At the start of the fall, the pastor had asked the Church for three things. First, to pray: whom am I praying for this year, so that they take one more step toward Jesus? Second, to tell your faith: “No one can argue with your testimony of what Jesus has done in your life. It is the most powerful tool you have.” Finally, to invite, to open your home and open the Church to others.
With this, the Church expressed a desire: to see 100 people saved, 100 people baptized, and 100 people in Alpha over the year. The last number has already been exceeded this semester: more than 100 people are signed up for the Alpha course. “One hundred people in an Alpha course in Stockholm in 2026,” people coming into contact with the Gospel. The Church also wishes to see 100 children and young people in its activities and 100 people in its prayer meetings.
But the gap between fine goals that everyone can sign up to and their fulfillment will always be filled by people who lay down their lives like a seed in the ground. “We are not into ‘name it, claim it,’ in the sense that it would be enough to say it for it to happen.” The kingdom grows when ordinary people lay down their lives for the Gospel.

5. What God Is Doing Among Young People

A youth leader shares what happened the previous Friday. The Church had long wanted to see more young people at the Friday evenings. For the first “Invite” evening, where young people are encouraged to come with their friends, seven new young people were there.
A guest preacher spoke about the prodigal son and receiving Jesus. Nine young people raised their hands to receive Jesus for the first time or to draw near to him. Two prayed the prayer of salvation, and Bibles were handed out.
In the Church's office, a small board gets a pin every time someone receives Jesus. It reminds everyone of the essence of all the Church does: to see one more person pass from death to life and know Jesus as their personal friend, their Lord and their Savior.
What happened that Friday was no accident. This leader has often cried because too few young people were coming to faith. She carried that burden and turned the format over in every direction. “This is not a revival.” Stockholm does not change overnight. But God is doing something, and it starts with one person saying: “God, I lay down my life so that someone else can meet you.”
The pastor sees a spiritual movement in the Church and in the city, and he thinks the Church is arriving at the moment when it really starts to cost. Missing a service to help in Sunday school. Stepping into the kitchen for Alpha. Making room in your schedule to come and pray. Talking about Jesus, praying for people, inviting them to your home and to church.
“All of this is uncomfortable. It takes strength and time. It puts others at the center of my life, and my flesh and my comfort do not like that.” But if we want to see the kingdom break out among us, it will always begin by sowing what I have and what I am in God's good soil.

6. A Loop That Never Stops

Since the kingdom is like a mustard seed, we cannot lean on our old experiences or our old victories. We are never finished. We have never “done our part” once and for all.
Whether you are 15 or 90, the invitation returns: to enter a new season and give Jesus again what you are and what you have, so that he multiplies it by his Spirit.
What you have does not need to be big or impressive. Your résumé does not need to be long, nor your spiritual merits grand. Your little, handed over to Jesus, can bear much fruit in every season.
The pastor sees something deep in this, almost prophetic: Jesus does not choose the oak that is planted and then stays there for centuries. He points to something that must be repeated over and over. You have to sow for something to grow and be harvested. It is a loop, a permanent cycle.
So we cannot throw the ball, rest, and say: “There, it works.” If we want to see the city come to know Jesus, it is daily work: “God, I lay down my life so that others may meet you wherever I go.”

7. A Faith Like a Mustard Seed

In Luke 17, the apostles say to the Lord: “Increase our faith.” Who would not join in that prayer? Jesus answers: “If you had faith like a grain of mustard seed, you would tell this sycamore tree, ‘Be uprooted, and be planted in the sea,’ and it would obey you.”
The pastor finds this saying provocative. He admits he has never transplanted a tree from his garden by talking to it. In a parallel text in Matthew, faith like a mustard seed can move mountains. “I have never seen that either.”
He did the math: a mustard seed contains about 600 trillion electrons, a 6 followed by 20 zeros. If one mustard seed is enough, his own faith must be at the level of an electron, since he does not move mountains. Unless Jesus means something else.
“What if it was not the size of what we have that mattered, but what we do with it?” Faith like a mustard seed is not a tiny faith. It is a faith put to work so that something grows and multiplies. Jesus does not say: “How weak you are.” He says: “If you give me your little, I will show you what I can do with it.”
We often disqualify ourselves: “When I have reached this level, when I have read this book, listened to this podcast, you'll see.” The pastor quotes an expression he heard the day before, “podcast obesity”: many Christians eat, eat, and eat, without becoming stronger or having more faith. At some point, the issue is no longer knowledge, but obedience.
The Church loves knowledge, which is why it holds Bible studies in the evening, and you need to know your Bible. But you cannot count on knowledge alone to get moving. James 2:17 says this uncomfortable word: “Even so faith, if it has no works, is dead in itself.”
Faith like a mustard seed is an invitation full of hope: if we give our little, God will do his great. No need to wait for more faith, more knowledge, better conditions, a better moment, or more time. Here and now, faith comes alive when it turns into action so that others may meet Jesus.
The kingdom of God is among us (Luke 17:21). What potential, then, does this congregation have to reach the city, if we agreed to surrender our own agenda and say: “Jesus, may your kingdom come, may your will be done in my life as in heaven”? What matters is not what we have now, but into whose hands we place our lives, again and again.
Jesus promised to build his Church; he asked us to extend his kingdom. Stockholm and Sweden are going through a time when more people than in a long while are searching for something, all over the place. The calling of the Church is to become a community where it is easy to know Jesus, to take one more step toward him, and to begin following him, not as a mere intellectual conviction, but with consequences in daily life.
“We all have 24 hours a day. We have the same Holy Spirit.” We have different strengths and different conditions. But the principle remains: wherever someone lays down their life for the Gospel, God makes something grow, thirty, sixty, or a hundredfold. The Lord does his part, but it begins in a heart that says: “Here I am, use me, send me, Jesus.”

Key Takeaways

The kingdom of God is not imposed by force: it starts small and grows like a seed.
The mustard plant dies every year, but leaves thousands of seeds. The kingdom has to be sown every season to keep multiplying.
The kingdom advances when something is planted and dies: wherever someone lays down their life for another, God brings forth fruit.
Faith like a mustard seed is not a minuscule faith, but a faith put to work. At some point, the issue is no longer knowledge, but obedience.
What you have does not need to be impressive: your little, placed in the hands of Jesus, can bear much fruit.

Personal Application

Whom are you praying for this year, so that they take one more step toward Jesus?
When did you last tell someone what Jesus has done in your life?
Are you leaning on old victories, or are you ready to enter a new season and give yourself again?
Are you waiting for more faith, more knowledge, or a better moment before acting? What step of obedience can you take this week?
What could you concretely lay down, of your time, your comfort, your home, so that someone else can meet Jesus?

Verses Cited

Frequently Asked Questions

Why does Jesus compare the kingdom to a mustard seed rather than an acorn?

An acorn becomes an oak that can live for centuries. The mustard plant is an annual: it grows, dies after a year, but leaves tens of thousands of seeds. For Alfred Nygren, Jesus is showing that the kingdom does not rest on a fixed success: it has to be sown again and again to keep multiplying.

What does it mean to have faith like a mustard seed?

According to the preacher, it is not a tiny faith that would be enough for everything. It is a faith put to work, so that something grows and multiplies. The question is not the size of what you have, but what you do with it. As James 2:17 says, faith without works is dead in itself.

How does the kingdom of God spread in practical terms?

Jesus builds his Church, and we extend his kingdom. For Alfred Nygren, the kingdom spreads when ordinary people lay down their lives for the Gospel: praying for someone, telling what Jesus has done for them, opening their home, serving in Sunday school or in the kitchen for the Alpha course. It costs, but it is the soil where God makes something grow.