What does "help my unbelief" mean (Mark 9:24)?

WHAT DOES THE BIBLE SAY?

The statement “help my unbelief” (Mark 9:24) is found in the context of Jesus healing a demon-possessed son. The son’s father originally asked the disciples to cast out the demon, but they could not (Mark 9:14–18). Frustrated, Jesus commented that it was a “faithless generation,” referring to the lack of belief of everyone around (Mark 9:19). Jesus then asked for the details about the boy’s possession (Mark 9:20–22). As he answered Jesus, the man said, “If you can do anything ….” (Mark 9:22). That statement was yet another expression of disbelief.

Jesus chided him for his disbelief, saying that the demon could be cast out for those who believe (Mark 9:23). The desperate father cried in response, “I believe; help my unbelief!” (Mark 9:24). What the man was expressing was the honest admission that his faith was weak but that he wanted to believe. So, he stepped out in faith, actively believing and asking Jesus to strengthen him and remove the unbelief fueled by his weakness. Jesus then answered the man’s request by casting the demon out (Mark 9:25).

This man’s request for “help my unbelief” was actually a statement of faith as he believed Jesus could help him believe. We will also have times of doubt, and this man’s response serves as an example for us during those times, showing how to bring that doubt to God while still believing.

FROM THE OLD TESTAMENT

• "Help my unbelief" is not found in the Old Testament.

FROM THE NEW TESTAMENT

• "Help my unbelief" is found in the larger context of Mark 9:14–29. In it, Jesus arrives on the scene to a large crowd of people and scribes surrounding the disciples (Mark 9:14). The crowd saw Jesus and ran to him as a father explained that “I brought my son to you, for he has a spirit that makes him mute” and other serious complications from it (Mark 9:15–17). He then explained that he had asked the disciples to cast out the demon, but they were unable to do so (Mark 9:18).
• This sets the scene for Jesus to say, “O faithless generation, how long am I to be with you? How long am I to bear with you? Bring him to me” (Mark 9:19). While it’s possible that Jesus could have been referring to any specific individual or group (the man, the crowd, the scribes, or the disciples), they are all together in this mess with the disciples at the center of the problem. So, it’s likely he’s referring to them all and, by extension, all of humanity.
• Though he’s exasperated, Jesus doesn’t walk away. Rather, he uses this as a teaching moment. When the boy is brought to Jesus, “the spirit saw him, immediately it convulsed the boy, and he fell on the ground and rolled about, foaming at the mouth” (Mark 9:20). A bit ironically, only the demon believed and responded in fear to Jesus’ presence, trying to hurt the boy.
• The man began to explain to Jesus how often this happens and that the demon even causes him to fall into water and fire, intent on killing him (Mark 9:22a). He then said, “But if you can do anything, have compassion on us and help us” (Mark 9:22b). The dejected man who had seen the disciples fail expressed doubt by saying, “If.”
• Jesus, who had just said that they were all faithless, now specifically chided the men, saying, “‘If you can’!” adding, “All things are possible for one who believes” (Mark 9:23). Contextually, Jesus did not mean that having faith meant one could do anything they wanted, but rather that God can do everything, and believing in Him was an expression of trust in who He is and what He can do.
• The man cried out, “I believe; help my unbelief!” (Mark 9:24). The man was doing two things. First, He was mustering up as much faith as he could by actively believing. Second, he was honestly admitting that his faith was weak and thus needed Jesus to strengthen him. In short, the man wanted to believe, but his doubts from life and the recent experience with the disciples were real and harming his faith.
• Jesus, seeing the man’s genuine desire to believe, mercifully intervened, casting the demon out (Mark 9:25). By doing so, He both strengthened the man’s faith by showing that his faith was well placed in Jesus and demonstrated to the crowd the importance of faith.
• The story ends with Jesus then addressing the disciples privately about their lack of faith. Specifically, He said, “This kind cannot be driven out by anything but prayer” (Mark 9:29). This is a curious statement, since the passage was about faith, not prayer. However, Jesus was teaching the disciples that spiritual activities, such as casting out demons, were not done by one’s own ability but by reliance on the Father. Like the man who asked Jesus to “help my unbelief,” prayer is an expression of trust that God can do what is asked of Him.

IMPLICATIONS FOR TODAY

Hebrews teaches that “without faith it is impossible to please [God]” (Hebrews 11:6). But why does God require us to have faith?

Faith is humbly accepting what He says is true, even when we can’t understand it. It’s not a blind faith, but a faith that trusts the God who never lies (Titus 1:2). When we express faith in what He tells us, even when it goes beyond what we can explain, our humility pleases Him. It shows that we value Him over our own senses.

Everything about the Christian life is based on faith. We have faith that Jesus rose from the dead. We have faith that He will return for us. We have faith that the pleasures of this world are worth giving up because the eternal pleasures are better. Yet, being a Christian doesn’t mean having perfect faith or never questioning God. The Psalms are filled with men asking God why something is happening or asking whether He will ever intervene. So, the Psalms show that doubts are natural. However, they also model how a believer is to redirect their doubts: by remembering who God is.

In Lamentations, Jeremiah cried out to God as He was punishing Israel. What he describes is horrific, but there’s a moment in the middle when he stops and keeps himself from doubt. He said, “But this I call to mind, and therefore I have hope: The steadfast love of the LORD never ceases” (Lamentations 3:21–22a).

Jeremiah reminded himself who God is, and that kept his thoughts in check. We will also have doubts, particularly when things aren’t going our way. We, too, must remind ourselves who God is and, like the man in the story, ask Him to help our unbelief.

UNDERSTAND

• "Help my unbelief" is the honest cry of a man whose faith was real but weak.
• "Help my unbelief" is a cry of faith, and Jesus did not rebuke the man for his weak faith.
• "Help my unbelief" reveals the need to trust in and depend on God.

REFLECT

• In what situations do you find yourself saying or feeling “I believe, but help my unbelief,” and how are you bringing that to Jesus?
• How does Jesus' merciful response to weak and honest faith encourage or challenge you?
• In what ways might Jesus be inviting you to trust His character more deeply even while your emotions or circumstances feel uncertain?

ENGAGE

• How does this passage challenge the idea that strong faith means never experiencing doubt or hesitation?
• What does Jesus’ response to the father reveal about how He relates to people who come to Him with faith and honesty?
• How can we create space for people to express doubt while still encouraging real trust in Jesus?