Faith the size of a mustard seed. Ten men healed of leprosy, and only one who bothers to say thank you. A warning about false messiahs, and a sobering reminder about Lot’s wife. Luke chapter 17 covers an enormous range — from the practical demands of daily forgiveness to the cosmic scale of Jesus’s return.
Let’s walk through it.
Woe to Those Who Cause Others to Stumble
Through the story of Lazarus and the rich man, along with the parables preceding it, Jesus has made something abundantly clear: eternity is real, and no one crosses back from beyond it to warn us directly (verses 1–2). This makes how we live now, and how we represent Jesus to others, matter enormously — what we do on this side of eternity counts forever.
Temptation is inevitable in this life, but Jesus pronounced real misery on whoever becomes the source of someone else’s temptation. It’s worth understanding the specific word Jesus used here — the Greek skandalon, originally referring to a bent stick used to spring a trap, and later extended to mean a stumbling block, something people trip over.
Interestingly, a skandalon isn’t always described negatively in Scripture — sometimes people “stumble” over Jesus himself, offended by the gospel message (Romans 9:33; 1 Corinthians 1:23; Galatians 5:11). But among believers, causing a skandalon is always treated as a serious problem — whether through bad counsel (Matthew 16:23), leading a fellow believer into sin through careless use of personal freedom (Romans 14:13), or spreading division and false teaching within the church (Romans 16:17).
Essentially, Jesus was saying: people will inevitably take the bait, but woe to whoever offers the hook. People will inevitably trip, but woe to whoever deliberately places the stumbling block. If someone seems ready for God’s judgement or discipline, that’s God’s business to handle — not ours. God doesn’t need us to serve as instruments of judgement; he calls us instead to be instruments of his love.
First John 2:10 offers the practical solution to avoiding this trap altogether: “Anyone who loves a fellow believer is living in the light and does not cause others to stumble.” When we genuinely love our brothers and sisters, we won’t become a source of offence in their lives.
Confronting Sin, Choosing Forgiveness
When someone sins against you, the answer isn’t to pretend nothing happened — the appropriate response is to lovingly confront that person directly (verse 3).
Love governs this whole process. Obviously, we can’t walk around meticulously cataloguing every minor offence committed against us — patience is part of the fruit of the Spirit, and daily life requires plenty of patience with life’s small, petty irritations. Ephesians 4:2 puts it plainly: “Always be humble and gentle. Be patient with each other, making allowance for each other’s faults because of your love.”
But when we’re genuinely wronged in a significant way, love calls us to follow the pattern of Ephesians 4:15 — speaking the truth in love. Love doesn’t mean gossiping about the offence to others, and it doesn’t mean silently bottling it up inside. Love means going directly to the person responsible and addressing it honestly.
“If he repents, forgive him” — this is Jesus’s clear command, with no alternative option given. Once someone who has wronged us genuinely repents, forgiveness is required.
What About Those Who Never Repent?
What happens with someone who never actually repents? Are we still required to forgive them (verse 4)?
Yes. Even if full reconciliation proves impossible because both parties can’t reach common ground, we can still choose to forgive on our own side, entrusting God to work in the other person’s life and heart over time.
If someone wronged you seven separate times in a single day, each time asking for forgiveness, it would be reasonable to wonder whether their repentance was even sincere. And yet Jesus still commands forgiveness in that situation — a clear indication that judging the sincerity of someone else’s repentance simply isn’t our job.
Faith Like a Mustard Seed
The idea of continually forgiving every offence from everyone, without exception, felt so demanding that even Jesus’s own disciples recognised they’d need extraordinary faith just to keep this command at all (verses 5–6).
We often think of faith primarily in terms of dramatic, miraculous displays of power. That may be true in some cases, but arguably the greatest miracles of faith involve the restoration of broken relationships.
The mulberry tree Jesus references here was known for extraordinarily strong roots — some believed it could remain firmly rooted for up to six hundred years. Unforgivingness and bitterness can take root just as deeply and stubbornly within us. But through genuine faith, Jesus can rip those deep roots out entirely, uprooting them completely and casting them away.
The emphasis on “a mustard seed” points to the kind of faith required, not the location or size of faith itself. Someone could hold enormous faith placed in a false god, which ultimately accomplishes nothing — while even a tiny amount of faith, no larger than a mustard seed, can accomplish extraordinary things when placed in the one true, mighty God.
Unworthy Servants
Jesus had just described the kind of great works possible through genuine faith — now he added a word specifically aimed at guarding against the pride that can arise when God uses someone significantly (verses 7–10).
It’s worth noting this teaching was directed specifically at the disciples, not the surrounding crowd — the chapter opens with “One day Jesus said to the disciples.” This wasn’t a teaching on the path to salvation, but on the posture of service expected from those already saved.
Jesus described the kind of hard, demanding labour involved in both ploughing fields and tending sheep — work requiring real patience, careful attention, and a genuinely caring heart, much like faithful spiritual ministry. He then pictured a servant returning home after a full day of this exhausting work. Rather than the master complimenting him, feeding him, or attending to his needs, the master simply expects the servant to continue serving, since there’s still more work to be done.
In light of what Jesus had just taught about ongoing forgiveness and continued acts of faith, the application is clear: there are always more people to forgive, and always more works of faith still waiting to be done.
“Does the master thank the servant…” Of course not — in the pre-Christian culture of that era, this kind of gratitude toward a servant would have been unthinkable. We don’t serve Jesus while demanding his thanks or praise in return. Why would he owe us thanks, given everything he’s already done for us? Why would he thank us, considering everything we’ve still left undone? And why would he thank us at all, when everything we have and everything we’re able to do ultimately comes from him in the first place?
And yet — remarkably — he will thank us and reward us anyway. Even though we don’t deserve it, Jesus will look at each of his children’s faithful work and say, “Well done, my good and faithful servant” (Matthew 25:21).
“We are unworthy servants” — this isn’t false humility, the kind that insists “I’m no good at anything.” It’s simply an honest recognition that Jesus has done infinitely more for us than we could ever do in return for him. What he did for us flowed from pure love; what we do for him flows from genuine gratitude and duty. Understanding fully what God has already accomplished for us in Jesus naturally produces a desire to serve him out of gratitude rather than obligation — and when our hearts are rightly aligned, we serve as though genuinely privileged to be allowed the opportunity.
Ten Lepers, One Who Returns
Lepers commonly gathered together in groups, since society at large rejected them entirely, leaving other lepers as their only real companionship — which is why they approached Jesus while standing at a distance (verses 11–14). This physical distance was also legally required, since lepers were forbidden by law from approaching those considered ceremonially clean, out of fear of spreading infection (Leviticus 13:46; Numbers 5:2; 2 Kings 15:5).
Remarkably, this particular group approached Jesus and prayed together despite being a mixed group of Jews and Samaritans — normally bitter ethnic and religious rivals. Their shared suffering had dissolved these deep-seated prejudices; leprosy had broken down every barrier between them, and in their shared misery, they’d apparently forgotten they were even supposed to be enemies.
It’s also remarkable that Jesus instructed them to go show themselves to the priests while they were still visibly afflicted with leprosy — technically risking being stoned for approaching a synagogue, let alone walking through town to reach one. The condition attached to this particular healing was simple obedience: once instructed, they had to actually obey. God consistently honours this kind of obedient faith, frequently using it as the very instrument through which he performs some of his greatest miracles.
Only One Returned
Of the ten healed, only one came back to express gratitude — and strikingly, he was the least likely candidate: a Samaritan (verses 15–19). Though he was the only one who returned, he was genuinely loud and enthusiastic in his thanks.
All ten had been willing to complete the required religious ritual — presenting themselves to the priest. Outward displays of praise — raising hands, saying “amen” at the right moments — remain fairly easy and common even today. It’s worth asking whether this passage suggests that only a small fraction of people in church on any given Sunday are genuinely, wholeheartedly worshipping Jesus, rather than simply going through familiar religious motions.
Jesus specifically noticed the absence of the nine who didn’t return, wondering aloud where they’d gone. Jesus notices our gratitude — or lack of it — and this passage reveals just how much value he places on genuine thankfulness.
There’s always a reason for genuine gratitude before God, whatever our circumstances. The Bible commentator Matthew Henry, after being robbed of his wallet, reportedly wrote in his journal that same night everything he still had to be thankful for: that he’d never been robbed before this incident; that although the thieves took his wallet, they didn’t take his life; that even though they took everything he had, it wasn’t very much to begin with; and finally, that he was the one who’d been robbed, rather than the one doing the robbing.
“Your faith has healed you” — a more precise translation would render this “has made you well,” since Jesus was referring specifically to God’s deeper work within this man’s heart. The other nine lepers left with healthy bodies, but their hearts remained untouched.
“The Kingdom of God Is Already Among You”
It’s easy to imagine a Pharisee approaching Jesus here, essentially demanding he either “put up” and visibly produce the Kingdom, or “shut up” and stop claiming to be the Messiah (verses 20–21).
“The Kingdom of God can’t be detected by visible signs” — the Greek word translated “detected” here is better understood as “hostile examination.” Jesus was telling the Pharisees that their skeptical, hostile scrutiny made them fundamentally unable to see or receive God’s Kingdom, no matter how much evidence was placed in front of them.
“The Kingdom of God is already among you” — Jesus told them the Kingdom was already present, right there among them, simply because the King himself stood in their midst. Much like many people today, the Pharisees claimed to want God’s Kingdom to arrive, without actually wanting the King who brings it.
Warnings About False Messiahs
Turning to address his disciples directly, Jesus told them that after he departed the earth, a time would come when his followers would deeply long for his return — and that many false messiahs would arise claiming to be him before his actual return finally occurred (verses 22–25). It’s essential these deceivers don’t succeed in leading believers astray.
“But don’t go out and follow them” — history has certainly seen many false messianic claimants since Jesus’s time: figures like David Koresh, Jim Jones, and Sun Myung Moon, among others. Even today, some Orthodox Jews believe a Brooklyn rabbi named Menachem Mendel Schneerson was the promised Messiah.
“For as the lightning flashes and lights up the sky” — Jesus’s actual return and triumph will be unmistakable and universally visible, just as everyone notices lightning flashing across the sky, with no need for anyone to point it out or convince others it happened.
Business as Usual, Right Up Until Judgement
Even as the world continued its ordinary routines right up until Noah’s flood and the judgement of Sodom and Gomorrah, Jesus indicated there will be a similar sense of normalcy in the world at the moment he’s revealed (verses 26–30). Jesus wasn’t suggesting the world will be free of crisis at that point — conditions before both the flood and Sodom’s destruction were genuinely terrible, but the surrounding wickedness had simply become accepted as routine and unremarkable by that point.
It’s worth noting, though, that other Scripture passages describe conditions at Jesus’s return quite differently — anything but business as usual:
- “There will be greater anguish than at any time since the world began. And it will never be so great again” (Matthew 24:21).
- “Then everyone—the kings of the earth, the rulers, the generals, the wealthy, the powerful, and every slave and free person—all hid themselves in the caves and among the rocks of the mountains… crying to the mountains and the rocks, ‘Fall on us and hide us…'” (Revelation 6:15–16).
Given how differently these passages describe conditions surrounding Jesus’s return, it’s reasonable to consider that his coming may unfold in two distinct phases separated by some period of time — a view that lends support to the idea of a rapture, in which Jesus first comes to gather his faithful people before the tribulation period begins.
Don’t Look Back
When Noah’s flood arrived, it’s easy to imagine people desperately trying to protect their possessions even as they themselves drowned (verses 31–33).
“Remember what happened to Lot’s wife!” Because she disobeyed God’s instruction and looked back at Sodom with longing regret for her old life, Lot’s wife was turned into a pillar of salt as she and her family attempted to escape (Genesis 19:26). Jesus uses her example here to caution his followers against looking back longingly at the world, urging us instead to keep our focus fixed firmly on God’s Kingdom.
Interestingly, when God rained down fire and sulphur on Sodom and Gomorrah, it’s believed the entire cities and surrounding region actually sank. This may explain why the northern portion of the Dead Sea today remains famously shallow — popular with tourists for floating — while the southern portion is considerably deeper.
Taken and Left Behind
This passage is frequently connected to what’s commonly called “the rapture” — a term describing Jesus’s coming specifically to gather his people (verses 34–35). The New Testament passage most closely associated with this event, and the source of the term itself (from the Latin translation of the Greek word used there), is found in 1 Thessalonians 4:16–18.
Because this event will occur in the middle of ordinary daily life, the emphasis throughout this passage rests heavily on readiness — Jesus will come suddenly, at a moment no one expects. The imagery of one person sleeping while another works simultaneously may reflect the reality that it will be daytime in one part of the world while nighttime in another — meaning Jesus will gather his people across the entire globe in a single unified moment, regardless of local time zones.
Are the Conditions Ready?
Many wonder whether present-day conditions align with what Scripture describes preceding Jesus’s return — both the gathering of his people and coming judgement on a world that has rejected him (verse 37). We can say with reasonable confidence that Scripture describes specific political, economic, spiritual, social, and military characteristics expected to mark the world before his return — and it’s fair to observe that many of these conditions already exist today. The stage, in a very real sense, appears to already be set.
The Bigger Picture
Luke chapter 17 moves seamlessly between the intensely personal — forgiving someone who’s wronged us for the seventh time in a day, noticing whether we’re the kind of person who remembers to say thank you — and the truly cosmic — false messiahs, sudden judgement, and the return of Christ himself. And yet both scales of this chapter point toward the same underlying call: stay alert, stay humble, and stay ready. Whether the moment calls for forgiving a brother or watching for the sky to split open, Jesus calls his followers to the same posture of faithful, grateful readiness.
As you study Luke 17, consider whether you’re more like the nine lepers who walked away healed but distracted, or the one who turned back to say thank you — and what genuine gratitude might look like in your own life this week.