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Event 89 — Causing Little Ones to Stumble

Still holding the child, Jesus widens His circle — “whoever is not against us is for us” — then sounds one of His most fearsome warnings: better a millstone and the sea than to trip up one of these little ones. Sin is that serious, and the little ones are that precious.

Mark 9:38–50 Little ones & the war on sin Event 89 of the harmony The Life of Jesus
The big picture

Guard the little ones; make war on your sin

The child is still in the room. John, perhaps trying to recover some standing after the argument about greatness, reports a private victory: they had stopped a man casting out demons in Jesus’ name — “because he was not following us.” Jesus refuses the sectarian instinct: don’t hinder him; “he who is not against us is for us.” Even a cup of cold water given for His name’s sake will be remembered and rewarded. Then His tone darkens. Looking, still, at the little child in His arms, He warns of the opposite of welcome: to cause “one of these little ones who believe” to stumble is so grave that drowning — a heavy millstone around the neck, cast into the sea — would be the lighter fate. And if the danger of stumbling is in us, He is just as severe: better to lose a hand, a foot, an eye than to let it drag the whole self into hell. The language is deliberate, shocking hyperbole — not a call to literal self-mutilation but a call to ruthless, decisive war on whatever in us leads to sin. He closes with two images, fire and salt: everyone will be “salted with fire”; so “have salt in yourselves, and be at peace with one another.” Take sin in yourself with deadly seriousness — and handle the little ones, and each other, with care.

The text

Jesus / Teacher / Christ John, the disciples, the man, the little ones 📍 place demons / sin / hell key word

Underlined words (like these little ones who believe) link down to their original-language card in Word secrets below.

38John said to Him, “Teacher, we saw someone casting out demons in Your name, and we tried to prevent him because he was not following us.” 39But Jesus said, “Do not hinder him, for there is no one who will perform a miracle in My name, and be able soon afterward to speak evil of Me. 40For he who is not against us is for us. 41For whoever gives you a cup of water to drink because of your name as followers of Christ, truly I say to you, he will not lose his reward.

42Whoever causes one of these little ones who believe to stumble, it would be better for him if, with a heavy millstone hung around his neck, he had been cast into the sea. 43If your hand causes you to stumble, cut it off; it is better for you to enter life crippled, than, having your two hands, to go into hell, into the unquenchable fire, 45If your foot causes you to stumble, cut it off; it is better for you to enter life lame, than, having your two feet, to be cast into hell, 47If your eye causes you to stumble, throw it out; it is better for you to enter the kingdom of God with one eye, than, having two eyes, to be cast into hell, 48where their worm does not die, and the fire is not quenched.

Mark 9:38–48 (NASB95)
📖 Read it in context: the parallels, the “salt” close, and the lost sheep

The opening exchange is also in Luke 9:49–50: “he who is not against you is for you.” The millstone-and-stumbling warning is paralleled in Matthew 18:6–9, which then adds the tender flip side — the parable of the lost sheep (Matthew 18:12–14): the shepherd leaves the ninety-nine to seek the one that wandered, “your Father… is not willing that one of these little ones perish.” Mark then closes the unit with two riddling sayings on fire and salt (Mark 9:49–50): “everyone will be salted with fire… Have salt in yourselves, and be at peace with one another.” We fold that close into the teaching below. (Verses 44 and 46, the repeated “where their worm does not die,” are bracketed in NASB95 because the earliest manuscripts give the refrain only once, at v.48.)

👀 Read it like a detective — observe before you interpret

Before asking what it means, notice what the text actually says:

  • A pivot from welcome to warning: the scene moves from John’s “he wasn’t following us” (exclusion) to Jesus’ “not against us is for us” (inclusion), then to the gravest warning about harming the small.
  • Tiny acts weighed heavily: a single “cup of water” earns a lasting reward — small kindness, large account.
  • Stark either/or comparisons: “better… than” repeats — better a millstone and the sea; better maimed and alive than whole and lost. Watch the scales.
  • A drumbeat list: hand → foot → eye, each with the same structure — “if it causes you to stumble… cut it off / throw it out.” The repetition is deliberate hammering.
  • Shocking hyperbole: no first-century hearer thought Jesus literally wanted self-mutilation — the exaggeration measures how deadly sin is.
  • Two closing images: “salted with fire” and “have salt in yourselves” — fire that purifies, salt that preserves and seasons, ending on “be at peace with one another.”
Word secrets

What the original words mean

Six words behind a warning as tender as it is terrifying.

Mark 9:40 · “not against us is for us”
οὐκ… καθ’ ἡμῶν… ὑπὲρ ἡμῶν
ouk… kath’ hēmōn… hyper hēmōn
Literal: not against us… for (on behalf of) us

Right after grasping for status, the disciples try to police who belongs. Jesus refuses the sectarian reflex: a man genuinely doing good in His name is on the same side, even outside their circle. This is the open, generous flip side of a sharper saying (“he who is not with Me is against Me,” Matthew 12:30) — there is no neutral ground toward Jesus, but His people should be slow to draw narrow lines.

↑ Back to the passage
Mark 9:41 · “a cup of water”
ποτήριον ὕδατος
potērion hydatos
Literal: a cup of water

The smallest imaginable kindness — not a feast, just a drink — given “because of your name as followers of Christ.” Jesus weighs it on heaven’s scale and says it will never be forgotten. The same logic runs both ways in this passage: tiny acts of care toward His people matter enormously to God, and so does tiny harm.

↑ Back to the passage
Mark 9:41 · “will not lose his reward”
μισθός
misthos
Literal: wages, reward, recompense

Misthos is a worker’s pay — what is owed and remembered. Jesus is not teaching that we earn salvation by kindness; He is promising that God keeps perfect account of even the humblest service done for His name’s sake. Nothing offered in love to His little ones falls through the cracks.

↑ Back to the passage
Mark 9:42 · “one of these little ones who believe”
τῶν μικρῶν… τῶν πιστευόντων
tōn mikrōn… tōn pisteuontōn
Literal: of the little ones… who believe

The child in His arms expands into a category: the “little ones” are not only children but every lowly, vulnerable, new or weak believer — the ones the world overlooks and the proud despise. They are so precious to God that harming their faith is among the gravest of sins. Welcome them (Event 88); never trip them.

↑ Back to the passage
Mark 9:42 · “cause… to stumble”
σκανδαλίζω
skandalizō
Literal: to trip up, to set a snare for, to cause to fall

The root is skandalon, the trigger-stick of a trap — the thing that springs and brings you down. It gives us our word “scandal.” To skandalizō someone is to set a snare in their path that makes them fall into sin or away from faith. Jesus uses the same verb for the hand, foot, and eye: deal ruthlessly with whatever trips you, and never become the trap for someone else.

↑ Back to the passage
Mark 9:42 · “a heavy millstone”
μύλος ὀνικός
mylos onikos
Literal: a donkey-millstone

Not the small hand-mill a woman turned, but the great upper stone of a mill so heavy it took a donkey to turn it. Tied around the neck and dropped into the sea, it guarantees there is no surfacing. The grotesque image measures the weight of the offense: a brutal drowning would be the lighter fate compared to the judgment for snaring one of God’s little ones.

↑ Back to the passage
Mark 9:47 · “the kingdom of God”
ἡ βασιλεία τοῦ θεοῦ
hē basileia tou theou
Literal: the reign / kingdom of God

Notice how Jesus swaps the terms: “enter life” (v.43, 45) and “enter the kingdom of God” (v.47) are the same destination, set against being “cast into hell.” To enter God’s reign is to enter true, unending life — and it is worth any cost, any amputation of sin, to get there whole-hearted rather than to keep everything and be lost.

↑ Back to the passage
The world of the passage

A wider circle, a fearsome warning, a ruthless cure

The wider circle — don’t stop the outsider; “not against us is for us”; a cup of water is rewarded (v.38–41)
The warning — better a millstone and the sea than to trip one of these little ones (v.42)
The cure — cut off the hand, foot, eye that ensnares; enter life maimed rather than perish whole (v.43–48)
The close — salted with fire; “have salt in yourselves, and be at peace” (v.49–50)

Reading the Gospel well — the key question: “What is this episode telling us about Jesus?” He is the Lord who is fiercely tender toward the small and fiercely honest about sin — and the two go together. The same Jesus who folds a powerless child in His arms (Event 88) will speak of millstones and unquenchable fire to defend that child’s faith. He values the little ones so highly that He measures every kindness and every harm done to them on heaven’s scale, and He loves people too much to be soft about what destroys them. Mark places this right after the lesson on greatness, so the “child” Jesus just held becomes the “little one” He now protects; Matthew completes the picture with the lost sheep — the Father “is not willing that one of these little ones perish.” His severity about sin is the flip side of His seeking love.

🏺 Millstones, drowning, and Gehenna — the images behind the warning

Each picture would have struck Jesus’ hearers hard. The “donkey-millstone” was the massive upper stone of a commercial mill — drowning by such a weight was a known form of execution among Romans and others, and to a Jewish audience drowning carried added horror, since the sea was a place of chaos and a body lost in it could not be properly buried. “Hell” here translates Gehenna, named for the Valley of Hinnom just outside Jerusalem — a place once defiled by child sacrifice (2 Kings 23:10) and remembered as a smoldering, accursed ground. The closing line of v.48, “their worm does not die, and the fire is not quenched,” quotes Isaiah 66:24, the prophet’s image of final judgment. Jesus is not inventing lurid pictures; He is drawing on images His hearers already feared, to say: sin is this deadly — treat it accordingly.

📜 Hyperbole, “salted with fire,” and the lost sheep

“Cut it off… throw it out” is deliberate hyperbole — a recognized teaching device in Jewish wisdom, where vivid exaggeration drives home a point no one is meant to take with wooden literalism. The maiming is impossible to obey literally anyway (a blind, handless person can still sin in the heart); the command is to deal with the cause of sin as decisively as you would amputate to save your life. The puzzling close, “everyone will be salted with fire” (v.49), most likely fuses two ideas the chapter has raised — the purifying fire of judgment that tests every disciple, and salt as a preservative and seasoning of the covenant (Leviticus 2:13). So “have salt in yourselves, and be at peace with one another” turns the whole unit back toward the community: let God’s purifying work make you people who preserve peace rather than start fights over rank. And lest the severity overwhelm the tenderness, Matthew pairs it with the lost sheep (Matthew 18:12–14): the same God who warns so sharply against tripping a little one is the shepherd who leaves the ninety-nine to go after the one who strays.

From their world to ours

The Interpretive Journey

Good study doesn’t stop at “what it meant back then” or jump straight to “what it means to me.” It travels the distance carefully — from the original audience, across the differences, to the timeless principle, and only then home to us.

Step 1 · Their town

What it meant to the first hearers

What did the text mean to the biblical audience?

To the Twelve, fresh off arguing about rank, Jesus first widens the circle — stop policing who belongs; even an outsider doing good in His name is on the same side, and the smallest kindness is rewarded. Then He warns them with images they feared (a donkey-millstone, drowning, the accursed Valley of Hinnom): to cause “one of these little ones who believe” to fall away is so grave that a brutal death would be lighter, and they must wage ruthless war on whatever in themselves leads to sin. For Mark’s first readers — a community tempted to status games and exclusion — it was a call to humility, vigilance, and peace.

Step 2 · The river

Measure the differences between them and us

What separates the biblical situation from ours?

The images are culturally distant: we don’t use millstones, “Gehenna” is not a valley outside our city, and we must recognize the hand/foot/eye commands as Jewish hyperbole, not surgical instruction. We also have to hear “not against us is for us” alongside Jesus’ sharper “not with Me is against Me,” so we don’t turn it into “anything goes.” But the river is narrow on the core: the preciousness of the vulnerable believer, the deadly seriousness of sin, and the temptation to draw tribal lines all cross straight over.

Step 3 · The principlizing bridge

The timeless theological principle

What truth crosses over from then to now?

God treasures the vulnerable believer and weighs every act done to them, so we must never trip up a “little one” — and because sin is deadly serious, we are to deal with its causes in ourselves with ruthless, decisive resolve, all while keeping peace rather than drawing tribal lines.

Step 4 · The biblical map

How it fits the rest of Scripture

Does this principle hold across the whole Bible?

It holds throughout. The Father “is not willing that one of these little ones perish” (Matthew 18:14); “put to death… what is earthly in you” (Colossians 3:5); “make no provision for the flesh” (Romans 13:14); “a little leaven leavens the whole lump” (1 Corinthians 5:6); and “woe to the one through whom” the stumbling comes (Luke 17:1–2). Scripture everywhere treats both the protection of the weak and the radical mortification of sin as non-negotiable.

Step 5 · Our town

How we live it out today

How should we apply it now?

Two moves. First, guard the little ones: ask whether your example, your words, or your tolerance of sin could be tripping a new believer, a child, or someone weak in faith — and choose to be a cup of cold water instead. Second, make war on your own sin: name the specific “hand, foot, or eye” that keeps snaring you — the app, the relationship, the habit, the screen — and cut it off decisively rather than managing it. Stop policing who’s “in” and start keeping peace; let God’s purifying fire make you salt that preserves your community instead of salt that stings. The seriousness Jesus shows about sin is mercy — He is fighting for your life.

Connections

Consult the biblical map

PassageConnection
Matthew 18:12–14The lost sheep — the tender flip side: the Father “is not willing that one of these little ones perish.”
Luke 17:1–2“Woe to him through whom” the stumbling comes — the same millstone warning, restated.
Colossians 3:5–10“Put to death… what is earthly in you” — the same ruthless war on sin, applied to the heart.
Isaiah 66:24“Their worm will not die and their fire will not be quenched” — the image Jesus quotes for final judgment.
Go deeper

Resources to explore

Play the video here, then dig into the text with study tools and trusted reference works.

BibleProject — Gospel of Matthew (overview): the kingdom community Jesus is forming, and how it cares for the little ones (~9 min).

🎬 Watch & listen

📖 Study tools (free)

📚 Reference shelf

  • Craig Keener, IVP Bible Background Commentary: New TestamentBackground on millstones, Gehenna, and Jewish hyperbole.
  • Green, McKnight & Marshall, eds., Dictionary of Jesus and the Gospels (IVP)Articles on “hell,” “sin,” and “discipleship.”
  • R. T. France, The Gospel of Mark (NIGTC)Careful exegesis of the “salted with fire” saying.

Discussion questions

  • The disciples tried to stop a man because “he was not following us.” Where are we tempted to draw tribal lines, and what would it mean to hear “he who is not against us is for us”?
  • Jesus weighs a “cup of water” and the tripping of a “little one” on the same heavenly scale. How does it change you to know that small kindnesses and small harms both matter that much to God?
  • Why is the “cut it off” language clearly hyperbole — and what is the real, ruthless action it’s calling for in your life? Name a specific “hand, foot, or eye.”
  • Walk the Interpretive Journey: how do Jesus’ tenderness toward the little ones and His severity about sin actually belong together?
  • Only after all that does the question reach us: who is a “little one” your life is currently helping or hindering — and is there a snare in you that you have been managing instead of cutting off?