Series: Stories that Stir! (Jesus’ parables in Matthew) | Sunday 20th September 2026 | Message by Pastor Rolly Stahl

Matthew 13:31-35 – Jesus’ parables of the mustard seed and yeast1 Corinthians 15:16-20, 58 – Jesus’ resurrection guarantees our resurrection
Introduction
In our new series: “Stories that Stir!” we’re looking at parables that Jesus told. Jesus used pictures from everyday life to describe the kingdom of God – and to invite his hearers to become part of it. Let’s pray for God to open our hearts to today’s message.
Friends, at times we all get discouraged. Yes?
- Sometimes we look back on events, or seasons of life, and wonder: “What was that all about?”
- When we’re serving our families, or working hard in our jobs, we might sometimes wonder: “What difference am I making?”
- Sometimes we’re so exhausted that even simple tasks overwhelm us.
- At times, we might look at our lot in life, or the world around us, and wonder: “What on earth is God up to?”
Friends, if you’ve ever been discouraged that God isn’t doing more in your life, or more in the world, or that God isn’t doing it as fast as you’d like, then today’s parables will encourage you and renew your perspective. One parable is about a farmer growing herbs; and the other a woman baking bread.
1. Jesus’ parable of the mustard seed
“The Kingdom of Heaven[1] is like a mustard seed planted in a field. It is the smallest of all seeds, but it becomes the largest of garden plants; it grows into a tree, and birds come and make nests in its branches.” (Matthew 13:31-32 NLT)
In the ancient Middle East, the mustard seed was used to describe anything small.
- For example, the Jews talked of a droplet of blood as small as a mustard seed.
- If they were discussing a small breach of the ceremonial law (perhaps not washing hands properly), they’d speak of the defilement as small as the mustard seed.[2]
- Jesus even said: “If you have faith as small as a mustard seed, you can say to this mountain, ‘Move from here to there,’ and it will.” (Matthew 17:20 NLT)
While the mustard seed was small, the plant could grow as high as 3-4 meters. According to one commentator, “It was a common sight to see such mustard bushes …surrounded with a cloud of birds, for the birds love the little black seeds of the tree, and settle in the tree to eat them.”[3]
In ancient times, a huge tree was used as a metaphor to describe a vast kingdom.
E.g., Ezekiel describes the Assyrian empire as a great cedar tree.
The birds nested in its branches, and in its shade all the wild animals gave birth.
All the great nations of the world lived in its shadow. (Ezekiel 31:6 NLT, see Ezekiel 17:22-23)[4]
The kingdom of God is like a tree. Despite small beginnings, God will grow his kingdom.
Now at his trial, Jesus said that his kingdom is NOT of this world (John 18:36). As a servant King, Jesus ushers in the kingdom of God by putting broken people back together again, by telling them how things are in the kingdom of God, and by calling people into it by following him.
Jesus brings his forgiveness and leadership to all who receive him as their King. So,
the kingdom of God is wherever Jesus rules in the hearts and lives of his people.
While his kingdom started with only a few followers, it will end up greater than we can imagine. The grandeur of God’s kingdom will be revealed to all when Jesus returns in glory. People from many nations will be gathered within it. They will be part of a renewed creation, basking in the love and glory of God, and enjoying perfect peace.
2. Jesus’ parable of the yeast
“The Kingdom of Heaven is like the yeast a woman used in making bread. Even though she put only a little yeast in three measures of flour, it permeated every part of the dough.” (Matthew 13:33 NLT)
In the Bible, yeast is often used as a metaphor for evil that spreads – and influences people’s values and choices. But here, Jesus mentions yeast as a catalyst of growth and change. A woman baking bread would take a small portion of dough with yeast spores fermenting in it. Then she’d knead it through a large batch of new dough – and put it in a warm place. The hidden yeast goes to work, causing it to ferment and rise.
As the yeast metabolizes the sugars in the dough, it releases carbon dioxide that produces tiny gas pockets throughout the dough. The gas can’t escape because of the elastic gluten in the flour. When the loaf goes into the oven, the gas expands even more – until the dough bakes into shape. And out comes a loaf of bread.
Just as yeast transforms the dough, the kingdom of heaven permeates a person’s life – and brings profound and lasting change. It happens in both individuals and communities. Once Jesus comes into our hearts and lives, we are never the same again. And once the kingdom of heaven gets inside a bunch of people, it permeates and transforms society.
For example, the first Christians in Rome picked up abandoned babies left to die (mostly girls) – and raised them as their own. They provided welfare for widows and orphans. They loved one another in ways that made the pagans envious.
During two great plagues in the Greco-Roman world (c.165 AD and 251 AD), Christians cared for pagans whose families had deserted them.[5] Why did Christians risk their lives for the sake of others? Because Jesus’ resurrection had given them hope of a better future – and this transformed their behaviour. As a result, many pagans converted to Christianity.
Four encouraging application points:
1. Little is much if God is in it! (can we please say this together)
Friends, God’s works often start small.
- God chose an old couple, Abraham and Sarah, to create Israel and to bless all peoples on earth. (Genesis 12:3)
- The Lord raised Joseph from an Egyptian prison to save the world from starvation.
- God chose Gideon – the least of his family from the least of the clans – to deliver Israel from their enemies. (Judges 6:15)
- The Lord chose David, the runt of his family to be king. Little is much if God is in it.
RC Trench comments on Jesus’ humble beginnings:
“The Son of Man grew up in a despised province; he did not appear in public until his thirtieth year; then taught for two or three years in neighboring villages, and occasionally at Jerusalem; made a few converts, chiefly among the poor and unlearned; and falling into the hands of his enemies, died the shameful death of the cross; such, and so slight, was the commencement of the universal kingdom of God.”[6]
The baby born in a stable now influences the world. The man put to death now offers life to all. Paul reminds us: God chose the foolish things of the world to shame the wise; God chose the weak things of the world to shame the strong. (1 Corinthians 1:27 NIV)
From an insignificant seed, comes a mighty bush
From just a little yeast – an entire loaf is transformed.
Friends, whenever you’re discouraged by a lack of progress, remember: “Little is much if God is in it.” When you put the little you have into God’s hands, he can do much with it!
2. God is still at work, so don’t lose heart!
When struggling with small beginnings, it’s tempting to quit. Yet every big movement started from small beginnings.
From small beginnings… A bunch of once frightened and defeated disciples spread the good news of Jesus throughout the ancient world. Within a few generations, Christianity had spread all over the Roman empire and beyond, to India in the East, Ethiopia to the South, and Britannia to the West.
From small beginnings… the son of a German miner left law to study theology. Martin Luther’s discovery that God makes us right with himself through Jesus began the reformation.
From small beginnings… William Pitt urged his good friend William Wilberforce: “Why don’t you give notice of a motion on the slave trade?”[7] The idea was sown into the mind of one man, and with God’s help – and decades of resolve – the slave trade was abolished throughout the British empire.
From small beginnings… a bunch of Lutheran Christians gathered in this area. They started off meeting in people homes, until a transportable building became available. Then they built a church building with an office, kitchen, and Sunday school rooms. A few years later they built the church building we’re in today. Over those 60 odd years, thousands of people have heard the good news of Jesus, grown as his followers, and influenced others throughout Australia and the world.
Jesus’ parables of the mustard seed and yeast remind us that God is always at work in this world. With God’s power, the seed we sow today will grow crops in due season and add to the Lord’s harvest. In his big plan, God will bring all things together under one head, Jesus Christ. (Ephesians 1:10) So friends, don’t lose heart or give up![8]
3. God’s kingdom is at work within you!
Yeast working within the dough describes how the Holy Spirit transforms us. It’s like a home renovation. Jesus enters our hearts and comes into the “house” of our lives. But Jesus doesn’t want to be stuck in one room. He wants to do ALL of life with us. He wants to do a complete makeover – one room at a time.
Over time, the Holy Spirit transforms:
- Our understanding of who Jesus is, what he’s done for us, and what it means to do life with him.
- Our attitudes, values, opinions, passions, and interests.
- Our work and our play.
- How we go about relationships, sexuality, and marriage.
- How we process our emotions and resolve conflict.
- How we manage our finances – and serve others with our gifts.
- What we watch on TV, and how we engage with social media.
- How we deal with temptation, trials, or difficult people.
It’s an ongoing process. Paul reminds us: God, who began the good work within you, will continue his work until it is finally finished on the day when Christ Jesus returns. (Philippians 1:6 NLT)
4. God’s kingdom comes to others through you!
We believe that Jesus frees us from guilt and shame, makes us right in God’s eyes, is directing our lives for good, and has given us hope of eternal life. Yes?
You know, Jesus wants everyone on earth to share in that.
How does God’s kingdom grow like a mustard seed into a tree?
How does the grace of Jesus spread to others like yeast in dough?
One person at a time; one encounter at a time.
- Your life is the only “Bible” that some people read.
- You bring Jesus into your everyday encounters with others.
- Your everyday words and actions are pointers to the difference Jesus’ makes.
Every time that happens, people get to taste and see that the Lord is good. So, we keep praying that they too will come to trust and experience life forever with Jesus. Amen.
(c.1860 words)
An audio version of this message is available on St John’s Lutheran Church Tea Tree Gully YouTube page: https://youtu.be/MldhXPz4dG4
[1] The Kingdom of Heaven is Matthew’s version of the Kingdom of God. It’s the same thing.
[2] William Barclay, Gospel of Matthew, 2:84
[3] William Barclay, Gospel of Matthew , 2:85.
[4] Likewise, Daniel interprets a dream for the Babylonian king Nebuchadnezzar: “The tree you saw was growing very tall and strong, reaching high into the heavens for all the world to see. It had fresh green leaves and was loaded with fruit for all to eat. Wild animals lived in its shade, and birds nested in its branches. That tree, Your Majesty, is you. For you have grown strong and great; your greatness reaches up to heaven, and your rule to the ends of the earth.”’ (Daniel 4:20-22 NLT, see also Daniel 4:10-12)
[5] For a detailed account, see Rodney Stark, The Rise of Christianity – How the Obscure, Marginal Jesus Movement Became the Dominant Religious Force in the Western World in a Few Centuries, Chapter 4: Epidemics, Networks, and Conversion, (HarperSanFrancisco, 1997),73-94.
[6] RC Trench, “Notes on the Parables of our Lord,” http://executableoutlines.com/pa/pa_06.htm
[7] https://en.wikipedia.org/wiki/William_Wilberforce ‘On 12 May 1787, …Pitt challenged his friend to give notice of a motion concerning the slave trade before another parliamentarian did.’ ‘On 12 May 1789, he made his first major speech on the subject of abolition in the House of Commons, in which he reasoned that the trade was morally reprehensible and an issue of natural justice.’
[8] In my office, I have a Tom Roberts’ print of The Splitters with this text: Be steadfast, immovable, always abounding in the work of the Lord, knowing that your labour is not in vain. (1 Corinthians 15:58) When I’m struggling, it encourages me to keep going.








