MATTHEW | What is Faith, Exactly?

Devotional

Day 1: How Long Am I to Bear With You? The Weight of Self-Reliance

The disciples stood red-faced after failing to heal a demon-possessed boy, their education and past successes crumbling before human limitation. Jesus’ rebuke—“How long am I to bear with you?”—exposed their misplaced confidence in personal ability rather than dependence on Him. Faith falters when we treat it like a party trick to master rather than a posture of neediness. True power flows not from our competence but from Christ’s authority. The same words that rebuked the disciples also cast out the demon, proving where real strength resides. [10:21]

“And Jesus answered, ‘O faithless and twisted generation, how long am I to be with you? How long am I to bear with you? Bring him here to me.’ And Jesus rebuked the demon, and it came out of him, and the boy was healed instantly.” (Matthew 17:17–18, ESV)

Reflection: Where have you substituted formulas, effort, or past victories for raw dependence on Jesus? What situation are you trying to “heal” through your own strength rather than His words?

Day 2: Lord, Have Mercy: The Power of Helpless Prayer

A desperate father bypassed the disciples’ failed methods and fell at Jesus’ feet with three words: “Lord, have mercy.” His prayer required no eloquence, no spiritual resume—only the recognition that Christ alone could do what he could not. This is the heart of faith: open hands, not clenched fists. On Father’s Day, the message rings clear—our children need parents who model neediness, not invincibility. Weakness, not self-sufficiency, becomes the gateway to grace. [20:40]

“And a man from the crowd cried out, ‘Teacher, I beg you to look at my son, for he is my only child… I begged your disciples to cast it out, but they could not.’” (Luke 9:38–40, ESV)

Reflection: When have you defaulted to control instead of crying “Lord, have mercy”? What relational or spiritual “demon” feels beyond your fixing, inviting you to surrender it to Christ?

Day 3: Mustard Seed Faith: Small Trust, Mighty God

Jesus compared faith to a mustard seed—tiny, unimpressive, yet alive with potential when planted in Him. Farmers know seeds don’t grow by grit but by rain; so faith flourishes not through our striving but through God’s sustaining grace. The disciples’ mistake wasn’t weak faith but misdirected faith. A seed doesn’t obsess over its size—it simply roots itself in soil deeper than its doubts. [23:22]

“He said to them, ‘Because of your little faith. For truly, I say to you, if you have faith like a grain of mustard seed, you will say to this mountain, “Move from here to there,” and it will move, and nothing will be impossible for you.’” (Matthew 17:20, ESV)

Reflection: Are you fixated on the size of your faith or the sufficiency of your Savior? What “mountain” have you avoided confronting because you’ve underestimated Christ’s power in your small trust?

Day 4: Faith’s Measure: A Gift, Not a Trophy

Paul reminds believers that even their faith is measured and given by God—no room for boasting, only gratitude. Like plants in a shared garden, we grow at different rates under the same nourishing rain of grace. Comparing spiritual growth breeds pride or shame; receiving faith as a gift cultivates humility. The disciples’ credentials meant nothing—only Jesus’ authority moved mountains. [25:55]

“For by the grace given to me I say to everyone among you not to think of himself more highly than he ought to think, but to think with sober judgment, each according to the measure of faith that God has assigned.” (Romans 12:3, ESV)

Reflection: Where have you secretly prided yourself on being “more faithful” than others? How might embracing faith as a gift free you from performance or comparison?

Day 5: Doubters Welcome: Commissioned in Weakness

Even after the resurrection, some disciples doubted—yet Jesus still entrusted them with His mission. Faith isn’t certainty in our convictions but confidence in His authority. The church isn’t a club for the spiritually polished but a refuge for the wrestling. Like those early disciples, we’re called not to perfect our faith but to proclaim His reign, doubts and all. [29:50]

“When they saw him they worshiped him, but some doubted. And Jesus came and said to them, ‘All authority in heaven and on earth has been given to me.’” (Matthew 28:17–18, ESV)

Reflection: What doubt or failure have you hidden, fearing it disqualifies you? How might Christ’s authority, not your certainty, empower you to serve others today?

Sermon Summary

Matthew 17 brings Jesus down from the glory of the transfiguration into the mess at the bottom of the mountain. The scene places a desperate father at Jesus’ feet, begging for mercy because his son is tormented and the disciples could not heal him. Jesus’ rebuke lands hard: “O faithless and twisted generation, how long am I to be with you?” Jesus’ words expose that the problem was not lack of effort, lack of evidence, or lack of experience, but lack of faith.

The healing shows the difference between disciples trying their best and Jesus speaking with authority. Faith is not a power people possess, and faith is not a magic technique that gets pulled out when the right moment comes. Matthew shows that faith rests on who Jesus is and what Jesus can do. “In Jesus’ name” is not the latch on the door of prayer, but the posture of prayer, the confession that Jesus holds all authority in heaven and on earth.

“Little faith” names the disciples’ real problem. Matthew keeps using that phrase when the disciples panic about provision, storms, sinking, and bread. Little faith is not mainly about the quantity of faith, but the object of faith. Hebrews 11 confirms that faithful people are not impressive people climbing a moral ladder, but broken people who keep coming back to God for mercy.

Prayer becomes the honest language of helplessness. The father’s prayer, “Lord, have mercy,” stands against the disciples’ embarrassed question, “Why could we not cast it out?” Jesus’ mustard seed picture makes the same point. The seed is small, needy, dependent, and alive. Faith is a seed, not a muscle. A farmer can plant, fertilize, and work the ground, but no crop grows unless rain comes.

Romans 12 says faith itself is given by God, and that truth destroys self-righteousness. Faith as gift means nobody gets credit for being in the room, and nobody gets to look down on slow-growing Christians. The garden image gives room for big trees, little plants, borrowed nutrients, and the same rain of grace falling on all.

Matthew’s ending keeps the hope in view, because Jesus gives the Great Commission to disciples who still doubt. Jesus’ authority, not their confidence, becomes the foundation of their mission. The gospel answers the question, “What are you trying to do in your own strength?” Jesus keeps moving toward Jerusalem with disciples who will betray and abandon him, and after his resurrection he comes back to them. The risen Christ opens his arms and says, “Stop carrying that.”

Key Takeaways

1. Faith rests on Jesus’ power [12:49] Faith is not something stored inside a person like spiritual electricity. Faith looks away from the self and banks everything on Jesus being who he said he is. The disciples failed when their attention landed on their own ability, but the father found mercy when his need landed at Jesus’ feet. [12:49]
2. Little faith has the wrong object [17:37] Little faith is not fixed by trying to believe harder. Little faith gets exposed when confidence quietly shifts toward performance, experience, discipline, or control. True faith may be small, but it is living when it clings to the right Christ. [17:37]
3. “Lord, have mercy” is strength [20:22] The father’s prayer was not polished, impressive, or long. It was helpless, and that helplessness was exactly the point. Weakness becomes a gift when it brings a person honestly to Jesus instead of pretending to be self-sufficient. [20:22]
4. Faith is seed, not muscle [24:52] A muscle suggests self-improvement through sheer effort, but a seed suggests dependence, life, rain, and growth given from outside itself. God’s people may plant and tend the soil, but God gives the increase. That truth humbles the strong and gives patience toward the slow-growing. [24:52]
5. Jesus is patient with doubters [33:19] Jesus rebuked the disciples, but he did not abandon them. Jesus knew their coming betrayal and still walked toward the cross for them. The resurrection shows that his mercy reaches the very people who failed him. [33:19]

Youtube Chapters

[00:00] - Welcome
[03:11] - Father’s Day and Gospel Coalition Introduction
[05:52] - The Naive Seminary Crew
[08:35] - Matthew 17 and the Disciples’ Failure
[10:00] - Jesus Rebukes Little Faith
[12:49] - Faith Is Not Possessed Power
[16:39] - Why Couldn’t the Disciples Do It?
[20:22] - Lord, Have Mercy
[22:34] - Mustard Seed Faith
[24:52] - Faith Is a Seed, Not a Muscle
[27:12] - The Church as God’s Garden
[28:44] - Jesus Sends Doubting Disciples
[32:02] - What Is Being Done in Human Strength?
[33:19] - Jesus Keeps Walking Toward the Cross
[35:09] - Reflection and Prayer

Bible Study Guide

Bible Reading
Matthew 17:14-21 (ESV)
14 And when they came to the crowd, a man came up to him and, kneeling before him, 15 said, “Lord, have mercy on my son, for he is an epileptic and he suffers terribly. For often he falls into the fire, and often into the water. 16 And I brought him to your disciples, and they could not heal him.” 17 And Jesus answered, “O faithless and twisted generation, how long am I to be with you? How long am I to bear with you? Bring him here to me.” 18 And Jesus rebuked the demon, and it came out of him, and the boy was healed instantly. 19 Then the disciples came to Jesus privately and said, “Why could we not cast it out?” 20 He said to them, “Because of your little faith. For truly, I say to you, if you have faith like a grain of mustard seed, you will say to this mountain, ‘Move from here to there,’ and it will move, and nothing will be impossible for you.”

Hebrews 11:1-2, 39-40 (ESV)
1 Now faith is the assurance of things hoped for, the conviction of things not seen. 2 For by it the people of old received their commendation.
39 And all these, though commended through their faith, did not receive what was promised, 40 since God had provided something better for us, that apart from us they should not be made perfect.

Romans 12:3 (ESV)
3 For by the grace given to me I say to everyone among you not to think of himself more highly than he ought to think, but to think with sober judgment, each according to the measure of faith that God has assigned.

Observation Questions

In Matthew 17:17, Jesus rebukes the disciples as part of a “faithless and twisted generation.” What specific event prompted this rebuke, and how did Jesus contrast His authority with the disciples’ efforts?
The father in Matthew 17:15 prays, “Lord, have mercy.” How does this prayer differ in tone and content from the disciples’ question, “Why could we not cast it out?” (Matthew 17:19)? [20:22]
Hebrews 11 lists flawed individuals (e.g., Abraham, Moses, Rahab) as examples of faith. What common thread unites their stories despite their failures?

Interpretation Questions

Jesus says even “faith like a grain of mustard seed” can move mountains (Matthew 17:20). Why does He use a seed—small, dependent, alive—as the metaphor for faith instead of something like strength or effort?
The disciples had previously cast out demons (Matthew 10:1). Why might their “little faith” here stem from misplaced confidence in their own ability rather than Jesus’ authority? [12:49]
Hebrews 11:39-40 says the faithful “did not receive what was promised” in their lifetimes. How does this redefine success in the Christian life compared to worldly expectations?

Application Questions

Jesus’ rebuke in Matthew 17:17 highlights misplaced confidence in human effort. Where in your life are you tempted to rely on your own discipline, plans, or experience instead of depending on Christ’s power? [15:21]
The father’s prayer, “Lord, have mercy,” was raw and helpless. What current struggle or fear could you bring to God in similarly honest, unpolished words this week?
Faith is compared to a seed, not a muscle (Matthew 17:20). How might this truth reshape your attitude toward someone in your community who seems “slow-growing” in their faith? [27:12]
Hebrews 11 includes people who doubted and failed. How can remembering their stories help you respond to your own doubts or failures without shame?
Romans 12:3 says faith is a gift from God. How would internalizing this truth guard against pride in seasons of spiritual confidence or self-condemnation in seasons of weakness?

Sermon Clips

64s

“``And it's a reminder that of this phrase that faith is not a power you possess. Faith is not a power you possess. Faith is the substance of the power Jesus has. We do not contain power in and of ourselves to heal, to demonstrate, to do any work. The disciples' problem wasn't that they weren't doing the right practice or method. Their problem was they thought they could do it themselves. Faith is not a power we can possess. It's not a magic technique that we put in our pocket and we pull out when the party trick is available. Faith is not something we just muster up and we lean in on ourself. Faith is knowing that Jesus is who he said he was.”

58s

“Faith is saying, I believe who Jesus is, what He's done, He's for me, and I'm gonna bang my life that He's going to do what exactly what He said He's going to do. When we're not using faith, it's not mustering up some type of power, energy, or or mechanisms that we think God will respond to. I don't know if you know this or not, but God can do whatever he wants to do. He's not, oh, if they just say the right words. If they just do the right name. I don't know if you know this, but in Jesus name isn't lifting the door to your prayers. Jesus name is the posture of our prayers. In Jesus name, when we pray in Jesus name, we're saying, God, I can't do this. I'm saying in Jesus name because Jesus holds all authority on earth as it is in heaven.”

76s

“What's prayer? Prayer is helplessness. Contrast the disciples approach to this father's approach where he just says three words. Lord have mercy. Can I just take it aside right now on Father's Day particularly? No, not all of us are fathers, but some of us are. And I just wanna say to fathers, the greatest gift we can give to our children is Lord have mercy. Your child's greatest need is not for you to be this uber strong, never flawless, never have any chinks in the armor, never have any sins. That's not the greatest gift you can give to your child. The greatest gift we can give to our children, even the boys I'm trying to raise to be strong, noble, is to teach them that weakness is a gift. That they deeply need Jesus. Because if I create little self sustaining, self efficient humans that never need Jesus, I've missed the mark.”

70s

“Faith talk can often gaze our eyes toward ourself, but this father's faith was gazing his eyes on Jesus like a mustard seed. It grows and it nurses and it spreads and it's dependent. I grew up in rural West Tennessee on a farm ground, And I learned a lot about faith from watching the farm community, watching my family, knowing that they can plant crops and they can put fertilize on and they can do all the things they need to do, but they will not grow a crop unless it rains. Our faith is like a seed, desperate, needy, but hopeful. As God brings rain, our faith flourishes. That's why plants and trees are the primary illustration of faith in the Bible. You do not produce your own fruit. God produces that fruit in you.”

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MATTHEW | What is Faith, Exactly? | 6.21.26