Verse-by-Verse Commentary
The Book of Mark
Chapter 9: Lord, I Believe; Help Thou Mine Unbelief
Mark 9 moves from the mountain of glory to the valley of need to the school of the cross. On a high mountain Jesus is transfigured before Peter, James, and John, His raiment shining, Moses and Elijah appearing, and the Father's voice declaring, 'This is my beloved Son: hear him,' until they see 'Jesus only.' Coming down, He meets a father whose son is tormented by a dumb spirit the disciples could not cast out, and draws from him the honest cry of every struggling believer, 'Lord, I believe; help thou mine unbelief.' A second time He foretells His death and rising. And when the disciples dispute who is greatest, He overturns the world's values: 'If any man desire to be first, the same shall be last of all, and servant of all.' He warns with fearful seriousness against causing His little ones to stumble, against the sin that leads to hell, and calls His people to 'have salt in yourselves, and have peace one with another.' The chapter fixes our eyes on the beloved Son, calls us to believing, humble, holy discipleship, and shows the glory that lies beyond the cross.
About This Commentary
This is a verse-by-verse study of Mark chapter 9. For each section you will find the KJV text, the Greek words that sharpen the meaning, plain explanation, and a Gospel Focus. Here Jesus is transfigured, heals a demon-possessed boy, teaches true greatness, and warns solemnly against sin. Every Scripture quotation is from the King James Version.
Setting the Stage
This Is My Beloved Son
Jesus is transfigured, and the Father's voice bids us hear Him.
Help Thou Mine Unbelief
A desperate father's honest cry meets the power of Christ.
Servant of All
The way to be first in the kingdom is to be last and servant of all.
Have Salt in Yourselves
Cut off sin, guard the little ones, and keep your saltness.
This Is My Beloved Son: Hear Him (Mark 9:1-13)
On the mountain the veiled glory of Christ shines out, and the Father's voice commands the world to hear His Son.
Jesus Only
"And he said unto them, Verily I say unto you, That there be some of them that stand here, which shall not taste of death, till they have seen the kingdom of God come with power. And after six days Jesus taketh with him Peter, and James, and John, and leadeth them up into an high mountain apart by themselves: and he was transfigured before them. And his raiment became shining, exceeding white as snow; so as no fuller on earth can white them. And there appeared unto them Elias with Moses: and they were talking with Jesus. And Peter answered and said to Jesus, Master, it is good for us to be here: and let us make three tabernacles; one for thee, and one for Moses, and one for Elias. For he wist not what to say; for they were sore afraid. And there was a cloud that overshadowed them: and a voice came out of the cloud, saying, This is my beloved Son: hear him. And suddenly, when they had looked round about, they saw no man any more, save Jesus only with themselves. And as they came down from the mountain, he charged them that they should tell no man what things they had seen, till the Son of man were risen from the dead. And they kept that saying with themselves, questioning one with another what the rising from the dead should mean. And they asked him, saying, Why say the scribes that Elias must first come? And he answered and told them, Elias verily cometh first, and restoreth all things; and how it is written of the Son of man, that he must suffer many things, and be set at nought. But I say unto you, That Elias is indeed come, and they have done unto him whatsoever they listed, as it is written of him."
Word Study
"was transfigured," Greek metemorphothe (μετεμορφώθη). The word means to be changed in form from within; it gives us "metamorphosis." This was not light shining on Jesus from outside but His own glory breaking out from within, "his raiment became shining, exceeding white as snow; so as no fuller on earth can white them." For a moment the veil of His flesh was drawn back and the three disciples beheld the glory of God shining through the man Christ Jesus. The One who came in lowliness let His true, divine glory be seen.
Explanation
Six days after the first passion prediction, Jesus is transfigured before Peter, James, and John -- His garments "shining, exceeding white" -- and Moses and Elijah appear with Him. Peter, not knowing what to say, offers to build three tabernacles, but the Father's voice corrects the impulse to equate the servants with the Son: "This is my beloved Son: hear him." When the cloud lifts they see "Jesus only," for the Law and the Prophets have handed their witness to Him. The glory that blazed out is not reflected but His own -- the hidden Deity shining through the flesh -- a preview of the resurrection to steady them for the coming cross.
Gospel Focus
Just after foretelling His death, Jesus gives three disciples a glimpse of the glory beneath the veil of His flesh. He "was transfigured before them," His raiment blazing white beyond anything on earth. Moses and Elijah, the great representatives of the law and the prophets, appear and talk with Him, for all the Scriptures point to Christ and find their meaning in Him. Peter, overwhelmed and not knowing what to say, wants to build "three tabernacles," one each for Jesus, Moses, and Elijah, as if the three stood on equal footing. Heaven corrects him at once. A cloud, the cloud of God's presence, overshadows them, and "a voice came out of the cloud, saying, This is my beloved Son: hear him." The Father sets Jesus in a place all His own: not one voice among three, but the beloved Son to whom all must listen. Then, when the disciples look up, "they saw no man any more, save Jesus only." Moses fades, Elijah fades; the law and the prophets have done their work of pointing forward, and now the fulfillment stands alone. This is the great lesson of the mount: Jesus only. Not Jesus and the law, not Jesus and any other, but Jesus alone, the beloved Son whom we must hear. For the Apostolic reader this seals who He is: the glory that shone from His face is the glory of the one true God veiled in flesh; the voice from heaven bears witness to Him as the beloved Son; and the command "hear him" makes Christ the final word. And notice the timing, glory just before the cross, for the way to that glory led through suffering. Even Elijah's coming (in John the Baptist) ended in rejection, and the Son of man "must suffer many things, and be set at nought." The mountain steadies us for the valley: keep your eyes on "Jesus only," hear Him, and follow Him through suffering to glory.
If Thou Canst Believe (Mark 9:14-29)
A father at the end of himself brings his tormented son, and finds that the honest confession of weak faith is enough for Christ.
Lord, I Believe; Help Thou Mine Unbelief
"And when he came to his disciples, he saw a great multitude about them, and the scribes questioning with them. And straightway all the people, when they beheld him, were greatly amazed, and running to him saluted him. And he asked the scribes, What question ye with them? And one of the multitude answered and said, Master, I have brought unto thee my son, which hath a dumb spirit; And wheresoever he taketh him, he teareth him: and he foameth, and gnasheth with his teeth, and pineth away: and I spake to thy disciples that they should cast him out; and they could not. He answereth him, and saith, O faithless generation, how long shall I be with you? how long shall I suffer you? bring him unto me. And they brought him unto him: and when he saw him, straightway the spirit tare him; and he fell on the ground, and wallowed foaming. And he asked his father, How long is it ago since this came unto him? And he said, Of a child. And ofttimes it hath cast him into the fire, and into the waters, to destroy him: but if thou canst do any thing, have compassion on us, and help us. Jesus said unto him, If thou canst believe, all things are possible to him that believeth. And straightway the father of the child cried out, and said with tears, Lord, I believe; help thou mine unbelief. When Jesus saw that the people came running together, he rebuked the foul spirit, saying unto him, Thou dumb and deaf spirit, I charge thee, come out of him, and enter no more into him. And the spirit cried, and rent him sore, and came out of him: and he was as one dead; insomuch that many said, He is dead. But Jesus took him by the hand, and lifted him up; and he arose. And when he was come into the house, his disciples asked him privately, Why could not we cast him out? And he said unto them, This kind can come forth by nothing, but by prayer and fasting."
Word Study
"help thou mine unbelief," Greek boethei te apistia (βοήθει τῇ ἀπιστίᾳ). The word boetheo means to run to the aid of one who cries out, to help the helpless. The father asks Jesus not only to help his son but to help his apistia, his "unbelief." It is one of the most honest prayers in Scripture: "Lord, I believe; help thou mine unbelief." He has faith, real but weak, mixed with doubt, and he brings even his weak faith to Christ and asks Him to strengthen it. Faith itself is a gift Christ can help; the cry of an honest, struggling faith is one He never refuses.
Explanation
Coming down from glory, Jesus finds His disciples defeated by a demon that convulses a boy. The father's cry is the honest prayer of every struggling believer: "Lord, I believe; help thou mine unbelief." Faith and doubt war in the same heart, and Jesus honors the faith that admits its weakness by casting out the spirit. To the disciples' private question why they failed, He answers, "This kind can come forth by nothing, but by prayer and fasting" -- some battles are won only by those who live in dependent communion with God. Power for ministry is not a technique but the fruit of a praying life.
Gospel Focus
From the glory of the mountain Jesus descends into a scene of failure and despair. A father has brought his demon-tormented son to the disciples, "and they could not" cast the spirit out. Jesus grieves over the "faithless generation," then turns to the desperate father. The man's plea is tinged with doubt: "if thou canst do any thing, have compassion on us, and help us." Jesus gently presses that "if" back on him: "If thou canst believe, all things are possible to him that believeth." The issue was not whether Jesus could, but whether the man would believe. And here the father speaks for every honest struggler in the faith: "Lord, I believe; help thou mine unbelief." What a prayer, faith and doubt confessed together, weak faith brought to the strong Saviour and asking Him to strengthen it. Jesus does not despise this trembling, imperfect faith; He answers it, casting out the spirit and lifting the boy, so nearly dead, "by the hand." This is deeply reassuring. Christ does not require a perfect, doubt-free faith before He acts; He welcomes the faith that honestly admits its weakness and cries for help. If your faith feels small and mixed with doubt, do not despair; bring it to Christ and pray this very prayer, "Lord, I believe; help thou mine unbelief." And when the disciples ask privately why they failed, Jesus points them to the source of spiritual power: "This kind can come forth by nothing, but by prayer and fasting." Their failure was not lack of technique but a prayerless, self- confident weakness. Real power over the enemy comes to those who stay near God in believing prayer. Bring your weak faith to the mighty Christ, and keep your soul strong in prayer.
Servant of All (Mark 9:30-50)
Jesus foretells His death again, redefines greatness as servanthood, and warns with fearful weight against causing others to stumble.
Have Salt in Yourselves
"And they departed thence, and passed through Galilee; and he would not that any man should know it. For he taught his disciples, and said unto them, The Son of man is delivered into the hands of men, and they shall kill him; and after that he is killed, he shall rise the third day. But they understood not that saying, and were afraid to ask him. And he came to Capernaum: and being in the house he asked them, What was it that ye disputed among yourselves by the way? But they held their peace: for by the way they had disputed among themselves, who should be the greatest. And he sat down, and called the twelve, and saith unto them, If any man desire to be first, the same shall be last of all, and servant of all. And he took a child, and set him in the midst of them: and when he had taken him in his arms, he said unto them, Whosoever shall receive one of such children in my name, receiveth me: and whosoever shall receive me, receiveth not me, but him that sent me. And John answered him, saying, Master, we saw one casting out devils in thy name, and he followeth not us: and we forbad him, because he followeth not us. But Jesus said, Forbid him not: for there is no man which shall do a miracle in my name, that can lightly speak evil of me. For he that is not against us is on our part. For whosoever shall give you a cup of water to drink in my name, because ye belong to Christ, verily I say unto you, he shall not lose his reward. And whosoever shall offend one of these little ones that believe in me, it is better for him that a millstone were hanged about his neck, and he were cast into the sea. And if thy hand offend thee, cut it off: it is better for thee to enter into life maimed, than having two hands to go into hell, into the fire that never shall be quenched: Where their worm dieth not, and the fire is not quenched. And if thy foot offend thee, cut it off: it is better for thee to enter halt into life, than having two feet to be cast into hell, into the fire that never shall be quenched: Where their worm dieth not, and the fire is not quenched. And if thine eye offend thee, pluck it out: it is better for thee to enter into the kingdom of God with one eye, than having two eyes to be cast into hell fire: Where their worm dieth not, and the fire is not quenched. For every one shall be salted with fire, and every sacrifice shall be salted with salt. Salt is good: but if the salt have lost his saltness, wherewith will ye season it? Have salt in yourselves, and have peace one with another."
Word Study
"hell," Greek geenna (γέεννα). The word "Gehenna" comes from the Valley of Hinnom outside Jerusalem, where children had once been sacrificed to idols and which had become a place of burning refuse, its fires always smoldering. Jesus uses it as the name for the final place of judgment, "the fire that never shall be quenched," where "their worm dieth not." That the Saviour, gentle beyond all, speaks so plainly and repeatedly of hell shows how real and how serious it is. He warns because He loves, urging us to deal ruthlessly with sin now rather than perish under judgment forever.
Explanation
Jesus again foretells His death, but the disciples are arguing who is greatest -- so He sets a child among them and redefines greatness as service: "if any man desire to be first, the same shall be last of all, and servant of all." He warns with terrible seriousness against causing "one of these little ones" to stumble and against letting hand, foot, or eye lead one into sin -- better to enter life maimed than whole into hell. The section ends with salt: "have salt in yourselves, and have peace one with another." The kingdom's true rank is measured downward, in humble, self-denying, peaceable love.
Gospel Focus
A second time Jesus tells His disciples plainly, "The Son of man is delivered into the hands of men, and they shall kill him; and after that he is killed, he shall rise the third day", yet they do not understand and are afraid to ask. And how far their hearts were from His: on the very road where He spoke of dying, they "disputed among themselves, who should be the greatest." Jesus does not crush the ambition but redirects it, teaching the kingdom's upside-down greatness: "If any man desire to be first, the same shall be last of all, and servant of all." He takes a child in His arms as the picture of the lowly ones His people must welcome and serve. When John boasts of forbidding an outsider who cast out devils in Jesus' name, the Lord corrects the narrow, sectarian spirit: "Forbid him not... he that is not against us is on our part," and promises that even "a cup of water" given in His name will not lose its reward. God notices the smallest kindness done for Christ's sake. Then come the most solemn warnings in the Gospel. To "offend one of these little ones that believe in me", to cause a young or weak believer to stumble into sin, brings a woe worse than drowning. And we must deal ruthlessly with whatever in ourselves leads to sin: better to enter life "maimed" than to be cast whole into "hell, into the fire that never shall be quenched." Jesus is not commanding literal mutilation but a radical, decisive war against sin, for the alternative is eternal ruin. He closes with salt: "Have salt in yourselves, and have peace one with another." Salt preserves, seasons, and purifies; His people are to keep their distinctive, purifying character and to be at peace together. The chapter that began on the mount of glory ends in the everyday battles of humility, tolerance of fellow servants, war on sin, and peace among the brethren, all under the shadow and the hope of the cross and resurrection.
Chapter 9 in Review
Mark 9 descends from glory to the valley to the school of discipleship. On the mountain Jesus is transfigured, His raiment blazing, Moses and Elijah appearing, and the Father declaring, "This is my beloved Son: hear him," until the disciples see "Jesus only." In the valley He heals a boy His disciples could not, drawing from the father the honest cry, "Lord, I believe; help thou mine unbelief," and teaching that such power comes "by prayer and fasting." A second time He foretells His death and rising. And He overturns the disciples' quarrel over greatness: "If any man desire to be first, the same shall be last of all, and servant of all," warns against a narrow spirit, "he that is not against us is on our part," and against causing His little ones to stumble, urging a ruthless war on sin lest one be cast into "hell... where their worm dieth not," and closes, "Have salt in yourselves, and have peace one with another."
For the Apostolic reader the chapter sets the beloved Son at the center and shapes the disciple around Him. He is the glory of God veiled in flesh, to whom the Father says "hear him" and beside whom, when all else fades, we are left with "Jesus only." He is the mighty Saviour who meets our weak, honest faith and asks only that we bring it to Him. And He is the Master whose way of greatness is servanthood, whose kingdom welcomes the lowly, whose warnings about sin and hell are the plain speech of holy love. Take the whole chapter together: hear the beloved Son, cry "help thou mine unbelief," seek to be servant of all, deal decisively with sin, and keep your saltness and your peace. The road runs through the cross He kept foretelling, but it leads to the glory the mountain revealed.
- The Transfiguration unveils the glory of God in Christ; the Father says, "hear him" (9:7).
- When all else fades, the disciple is left with "Jesus only" (9:8).
- Christ welcomes weak, honest faith: "Lord, I believe; help thou mine unbelief" (9:24).
- True greatness is to be "last of all, and servant of all" (9:35).
- Deal ruthlessly with sin; hell and its fire are real and eternal (9:43-48).
- Keep your saltness and be at peace with one another (9:50).
Questions for Reflection
- When the noise clears, are you content with "Jesus only," and truly hearing Him?
- Can you pray honestly, "Lord, I believe; help thou mine unbelief"?
- Are you seeking to be great by being the servant of all?
- Is there sin you are coddling that Christ says to cut off?
References & Sources
Scripture is quoted from the King James Version (KJV). Supporting passages are listed so every claim can be verified in its own setting. The glory and beloved Son: 2 Peter 1:16-18; John 1:14; Hebrews 1:3. Elijah and John the Baptist: Malachi 4:5-6; Matthew 11:14. Faith as God's gift and help: Ephesians 2:8; Luke 17:5. The reality of hell and the undying worm: Isaiah 66:24; Matthew 25:41, 46; Revelation 20:14-15. If anything here does not look right, a verse, a reference, or a wording, please tell us at info@FruitBearers.net. Thank you for helping us keep Bible Learning error free.
- The Transfiguration and the coming of Elijah: Mark 9:1-13; Matthew 17:1-13; Luke 9:28-36; 2 Peter 1:16-18.
- The healing of the demon-possessed boy: Mark 9:14-29; Matthew 17:14-21; Luke 9:37-43.
- True greatness, offences, and salt: Mark 9:30-50; Matthew 18:1-9; Luke 9:43-50; Isaiah 66:24.