Faith Anchored in Christ (Matthew 17:20)

2026 Bible Reading: Matthew 17–19

PRINCIPLE: Faith anchored in Christ and aligned with His will releases the power of God to accomplish what He purposes. (Matthew 17:20)

“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.’” – Matthew 17:20

In Matthew 17, Jesus was revealed in glory at the Mount of Transfiguration before Peter, James, and John (Matthew 17:1–8). This affirmed His identity as the beloved Son of God and His divine authority. As they came down from the mountain, Jesus instructed them not to speak of the vision until after His resurrection (Matthew 17:9).

The disciples then asked about Elijah, and Jesus explained that Elijah had already come in the person of John the Baptist, yet he was not recognized and was rejected (Matthew 17:10–13). This pointed to the rejection of God’s messengers and foreshadowed His own suffering.

When they returned to the crowd, a man approached Jesus and pleaded for his son who suffered severely from seizures. He said he had brought his son to the disciples, but they could not heal him (Matthew 17:14–16). Jesus rebuked the faithless generation, commanded the boy to be brought to Him, and with a word rebuked the demon. The boy was healed instantly (Matthew 17:17–18).

Later, the disciples asked Jesus privately why they could not cast out the demon (Matthew 17:19). Their question revealed confusion. Though they had been given authority and had seen God work through them before, they now failed (Matthew 10:1, 8). 

In Matthew 17:20, Jesus’ answer exposed the root of their failure. It was not a lack of opportunity or authority, but a problem of faith. They had been given the authority, but they were no longer depending on the One who gave it. The issue was not their method, but their trust. What they lacked was not power, but the kind of faith that relies fully on God. 

Jesus gave them the reason why they were not able to cast out the demon from the boy—it was “because of your little faith” (Matthew 17:20a).

The word translated “little faith” comes from the Greek oligopistia, which literally means “poverty” or “deficiency” of faith. It does not refer to the amount of faith, but to the condition of their faith. It describes a faith that hesitates, doubts, and fails to rely fully on God. The disciples were not without faith, but their faith was weak and unstable. Instead of depending on God’s authority, they shifted to relying on their own ability.

Jesus then said to them, “For truly, I say to you, if you have faith like a grain of mustard seed” (Matthew 17:20b). He pointed to a faith like “a grain of mustard seed” (kokkos sinapeōs). The mustard seed was proverbially small, often used to describe something insignificant. Yet it grows into something far greater than its beginning would suggest. The image highlights the contrast between what appears small and what becomes significant. What seems weak and insignificant can become powerful when God is at work.

The point Jesus made was not the size of faith, but where faith is placed. Even the smallest true faith is sufficient when it is rightly anchored in God. The issue is not how much faith we have, but whether our faith is truly resting in Him.

Jesus further elaborated and said, “you will say to this mountain, ‘Move from here to there,’ and it will move” (Matthew 17:20c). Most likely, since they were in the region of the Mount of Transfiguration—traditionally identified as Mount Hermon—He used the imagery of “moving a mountain,” a common Jewish idiom for overcoming great difficulty. He was not speaking of literal geographical change, but of accomplishing what seems humanly impossible in fulfilling God’s will. The focus is not on human ability, but on divine enablement.

He then said, “and nothing will be impossible for you” (Matthew 17:20d). The word “nothing” (Greek ouden) refers to no task or situation within what God calls them to do. The word “impossible” comes from the Greek adynateō, which means to be without power. Jesus was not promising unlimited ability, but declaring that no task God assigns will lack His power. What God commands, He empowers. What God wills, He enables.

The disciples failed because of “little faith” (Greek oligopistia)—a deficient faith that did not fully depend on God. Jesus called them to have “faith” (Greek pistis) like that of a mustard seed, a small but genuine faith anchored in Him. Such faith, though small, is sufficient because it draws from the power of God. Therefore, nothing becomes impossible (Greek adynateō)—nothing lacks power—when faith rests on Christ and aligns with His will.

Theological Reflection

This passage reminds us that faith is not measured by its size but by where it is placed. True faith is not confidence in self, but dependence on God. It is not the strength of our belief that accomplishes God’s work, but the power of God in whom we believe.

Faith is the proper response to God’s revelation. It is trusting His person, submitting to His will, and relying on His power. Scripture teaches that faith is not about what we can produce, but about how we relate to God in trust and obedience. It is not faith in faith, but faith in God.

The disciples’ failure shows that even those who know Christ can fall into self-reliance. When God entrusts us with opportunities and allows us to experience His power, we can subtly shift our dependence from Him to ourselves. When that happens, faith becomes weak—not in amount, but in condition. It no longer draws from God’s power.

Jesus calls us back to a faith that remains anchored in Him. Even the smallest true faith is sufficient because it rests on the infinite power of God. Therefore, nothing God assigns will lack His power. Yet this promise must always be understood within His will. Faith does not bend God to our desires; it aligns us with His purposes.

With God, nothing is impossible (Luke 1:37). And through Him, we can do all things He calls us to do (Philippians 4:13). Faith anchored in Christ and aligned with His will ensures that no assignment from God will ever lack His power.

Applications

First, Anchor Your Faith in Christ

Jesus pointed out that the disciples’ problem was not the absence of faith, but where their faith was placed. Their faith shifted from Christ to themselves. Faith must always be anchored in who Jesus is and what He can do.

We must guard where we place our trust. When we rely on our ability, we fail. When we rely on Christ, we experience His power. Anchor your faith in Him, not in yourself.

Second, Align Your Will with Christ

Faith is not about getting what we want, but about doing what God wants. Jesus made it clear that nothing will be impossible within what God assigns. Faith must be aligned with His will, not driven by personal desire.

We must seek what Christ wants, not what we want. When our desires align with His will, our prayers change and our faith becomes effective. 

Third, Act in the Strength of Christ

The disciples failed because they depended on themselves. True faith expresses itself in dependence on God. What God commands, He empowers. What He calls us to do, He will enable us to accomplish.

We must not act in our own strength. In every responsibility and assignment, we depend on Christ. Act in His strength, trusting that He will supply what we need.

Prayer

Father God, thank You for reminding us that the issue of faith is not its size, but where it is placed. Forgive us for the times we rely on ourselves instead of depending on You. Forgive us for our oligopistia—our weak and unstable faith that hesitates and fails to trust You fully.

Teach us to anchor our faith in Jesus Christ. Help us to trust who He is and what He can do for, in, and through us. Align our will with Yours so that what we desire is what You desire. Guard us from pursuing our own plans apart from You.

Strengthen us to act in the strength of Christ each day. In every task You assign, remind us that nothing will lack Your power. What You command, You empower. What You will, You accomplish.

Guide us by Your Holy Spirit to live a life anchored in Christ, aligned with Your will, and dependent on Your strength—nothing more, nothing less, nothing else. In Jesus’ Name. Amen.