[Week 11] The Stump That Everyone Forgot (Luke 3:9)

This week, we are memorizing Luke 3:9.

• Check out my latest Scripture Memorization song here: Luke 3:9
• If you're new here, see my introduction to this series here.

"The ax is already at the root of the trees. Therefore, every tree that doesn't produce good fruit will be cut down and thrown into the fire." — Luke 3:9 (CSB)

A Way Where There Was No Way

John the Baptist was, quite literally, preparing a way in the wilderness. Not a paved Roman road. Not a well-worn trade route. A way where there was no way.

And the first thing he had to clear wasn't brush or stones. It was an assumption that had been growing unchecked for centuries: that being a descendant of Abraham was enough to secure your standing before God.

"Don't start saying to yourselves, 'We have Abraham as our father,'" John warned, "for I tell you that God is able to raise up children for Abraham from these stones" (Luke 3:8, CSB).

That was a theological earthquake. For centuries, covenant standing came through birth. If you were born into Abraham's line, you were in. But the prophet Ezekiel had planted a radically different idea: that repentance, not lineage, determines who lives and who dies before God. "If the wicked person turns from all the sins he has committed, keeps all my statutes, and does what is just and right, he will certainly live" (Ezekiel 18:21). John wasn't just echoing Ezekiel. He was activating him, publicly, at the Jordan River, demanding that Abraham's own descendants repent as if their birthright meant nothing.

And then he said something even more devastating.

The Ax at the Root

"The ax is already at the root of the trees."

Let's slow down here, because John's audience would have heard layers of meaning in this sentence that we can easily miss.

The Greek word for "ax," axinē (ἀξίνη), appears only twice in the entire New Testament, here and in the parallel passage in Matthew 3:10. But for a Hebrew-speaking audience, the word behind it would have been garzen (גַּרְזֶן), and it would have immediately triggered a memory from the prophets. In Isaiah 10:15, God asks: "Should the ax boast over the one who chops with it?" In that passage, God is describing Assyria as His ax, the instrument He wielded to judge Israel. The ax doesn't belong to the woodsman. It belongs to God. He is the one swinging it.

John's audience knew this. When they heard "the ax is already at the root," they were not hearing a generic warning about being good people. They were hearing Isaiah 10. They were hearing the voice of a God who had used an ax before to destroy Israel through the Assyrians. Was another destruction coming?

(Spoiler: yes. Jesus Himself would later prophesy that the Temple would be destroyed, every stone overturned (Luke 21:5-6). And in AD 70, Rome did exactly that.)

But notice where John says the ax is positioned. Not at the branches. At the root.

Shoresh: The Root of Everything

The Greek word for "root" here is rhiza (ῥίζα), but the Hebrew word it translates is far richer: shoresh (שֹׁרֶשׁ). In Hebrew, shoresh doesn't just mean a botanical root. It means lineage, foundation, the irreducible core of identity. In fact, shoresh is the word used in Hebrew grammar for the root letters of a word, the foundational building blocks from which all meaning derives.¹

When John says the ax is at the shoresh, a Hebrew thinker hears: your very identity is under threat. This is not pruning. Pruning trims branches and allows regrowth. This is an existential confrontation. The ax at the root means the whole tree comes down.

And that is precisely what the prophet Malachi had warned about. Malachi 4:1 says the coming day of the LORD "will leave them neither root (shoresh) nor branch." No root. No branch. Nothing left. Total removal.

This matters because John the Baptist is explicitly identified as the fulfillment of Malachi's prophecy about Elijah (Malachi 4:5-6, later in the very same chapter). Luke tells us he came "in the spirit and power of Elijah." The fire of Luke 3:9 is the same fire in Malachi. The root in Luke is the same root in Malachi. John is not inventing new "lumberjack" imagery here. He is announcing that Malachi's judgment Day has arrived.

God's Vine That Produced Wild Grapes

But the prophetic echoes don't stop with Malachi. John's audience would have heard another passage ringing underneath this one: Isaiah 5.

In Isaiah 5:1-7, God describes Himself as a vineyard owner who planted Israel as His vine. He cleared the ground, built a watchtower, dug a winepress. He did everything right. Then He waited for the harvest. He expected good grapes, mishpat, justice. Instead, He found wild grapes, mispach, bloodshed. (That's a devastating Hebrew wordplay, by the way, one letter apart.)

God's response? Isaiah 5:5-6: "I will remove its hedge, and it will be consumed; I will break down its wall, and it will be trampled."

John is standing in front of a first-century version of that same vine, a nation that was supposed to produce justice and righteousness but instead was producing corrupt priesthoods, Roman collaboration, and the presumption that bloodline alone was sufficient standing before God. And he is saying: God's patience has a limit. The ax is already at the root.

But, don't forget, not every tree is coming down. Only the ones that don't produce good fruit. So, that leads us to the question: "What is good fruit?"

What Kind of Fruit?

John demands "good fruit" as the evidence of genuine repentance. But the word "good" here might not mean what you think. The Greek is kalon (καλόν), and it doesn't mean morally good. It means useful. Fit for purpose. Demonstrably excellent. John is not asking people to be nicer. He is asking them to produce something God can actually use. A tree that produces no usable fruit gets cut down, not because it's evil, but because it's taking up space where something fruitful should be growing.

And John tells us exactly what useful fruit looks like. In verses 10-14, three groups ask him, "What should we do?" His answers are strikingly concrete: if you have two shirts, share with someone who has none. If you're a tax collector, don't collect more than you're authorized. If you're a soldier, don't extort people. Be satisfied with your wages.

No abstract theology. No ritual requirements. Tangible, relational, economic justice and righteousness. That is fruit God can use.

But here's the tension John's audience would have felt immediately: they had been trying to produce this kind of fruit for centuries and failing. That's the whole story of Israel. That's why they added 600-some man-made laws to their list, desperately trying to engineer the obedience they couldn't sustain on their own. If the ax is coming for every tree that doesn't produce good fruit, and they already know they can't do it, then what hope is there?

The answer is in the fire.

Fire: Not Just Destruction

Here is where many readings of this verse stop too soon. We hear "thrown into the fire" and think only of judgment. And judgment is certainly part of it. The Hebrew word for fire, esh (אֵשׁ), appears roughly 375 times in the Old Testament, and it carries deep associations with God's consuming wrath. Deuteronomy 4:24 declares, "The LORD your God is a consuming fire."

But esh is not only destruction. It is also the medium of God's personal presence. The burning bush. The pillar of fire leading Israel through the wilderness. The fire on Sinai. Fire in Hebrew thought is simultaneously the instrument of judgment and the vehicle of revelation.²

Think about what happens next in Luke's account. Just a few verses later, John says: "He will baptize you with the Holy Spirit and fire" (Luke 3:16). The same chapter that warns of fire consuming fruitless trees also promises fire indwelling the faithful. The fire that burns the chaff is the same fire that descends at Pentecost.

God was not showing up to annihilate His people. He was showing up to inaugurate the new covenant through Jesus' death and to send His Spirit, His personal presence, to live within each person. The destruction of the old was making room for something unimaginably new. He was making a way where there was no way.

The Stump That Everyone Forgot

And this is where Isaiah 11 changes everything.

Remember, the same Hebrew word shoresh (root) that the ax targets in Luke 3:9 appears again in Isaiah 11:1, but the movement is opposite:

"Then a shoot will grow from the stump of Jesse, and a branch from his roots will bear fruit. The Spirit of the LORD will rest on him, a Spirit of wisdom and understanding, a Spirit of counsel and strength, a Spirit of knowledge and of the fear of the LORD." — Isaiah 11:1-2 (CSB)

Do you see it?

John's ax cuts at the root. Isaiah's shoot grows from the root. The Davidic tree had been cut back to a stump centuries before. The line of kings that began with David had been reduced to a carpenter's family (or maybe a "builder" 😉) in an unremarkable village called Nazareth, the name of which likely derives from the Hebrew word netzer (נֵצֶר), "branch" or "shoot," the very word Isaiah uses here.³

Everyone had forgotten the stump. The dynasty looked dead. The line of Jesse appeared to be nothing more than a memory, a relic of a glory days that had long since passed. But underground, the roots were alive. And from those roots, a shoot was about to emerge that would bear the very fruit God had always demanded from His vine: justice for the oppressed, righteousness as a belt around His waist, faithfulness as His very character (Isaiah 11:4-5).

The fruitless trees were being cut down. And from a stump nobody was watching, something more full and beautiful than anyone could have imagined was growing.

The Old Standard Falls, the New Standard Rises

So, to wrap it up, here is the full picture John's audience was hearing, whether they realized it or not (most didn't realize it until after Jesus resurrected and revealed it to them) and what John was trying to reveal to us:

Israel was God's vine, planted to produce justice and righteousness (Isaiah 5). The vine produced worthless wild grapes instead. God had used an ax before, through the Assyrians, to judge His people (Isaiah 10). Now the ax was back, positioned at the root, and this time the false standard itself was being cut down: the idea that being a son of Abraham automatically secured your place with God.

But the destruction was not the end. From the stump of Jesse, the forgotten remnant of David's fallen dynasty, a shoot was growing. The Messiah was coming, full of the Spirit of wisdom and understanding and the fear of the LORD (Isaiah 11:1-2). He would produce the good fruit that God had always expected, justice for the poor, righteousness, and faithfulness. And through His death and resurrection, He would send that same Spirit to live inside every believer, replacing hearts of stone with hearts of flesh (Ezekiel 36:26-27), empowering us to bear the kind of fruit John demanded: tangible generosity, honest dealings, and lives that embrace repentance.

John's ax cleared out the ground. Isaiah's shoot filled it. The destruction and the new creation were happening simultaneously. The old false standard was falling so the new one could rise.

What About You?

So here's the question John would ask you today.

Are you coasting on a label? "I grew up in church." "I was baptized when I was eight." "My family has always been Christian." These are not bad things. But they are not fruit. And the ax is not interested in your resume.

Are you producing fruit that people can actually see? Not intentions. Not beliefs held privately. Visible, concrete, relational evidence that your life has been changed. Sharing what you have with those who don't have enough. Doing honest work. Refusing to leverage your position to take advantage of others.

Or are you still standing on a stump that was cut down two thousand years ago, hoping the old roots of cultural Christianity will be enough?

The stump that everyone forgot produced the Messiah. The question is whether you're grafted into that root, the living one, the one that bears fruit through the Spirit of God living inside you.

Repent. Give your life and future to Jesus. Live faithfully. And produce fruit consistent with repentance. The ax is already at the root.

But so is the shoot.

"The ax is already at the root of the trees. Therefore, every tree that doesn't produce good fruit will be cut down and thrown into the fire." — Luke 3:9 (CSB)

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References

Photo by Enes Dincer on Unsplash