Mark 9:29
And he said unto them, This kind can come forth by nothing, but by prayer and fasting.
Mark 9:29 (KJV)
Context
Jesus has just come down from the Mount of Transfiguration with Peter, James, and John. He finds a crowd gathered around the other nine disciples, who were unable to cast out a demon from a boy. After Jesus heals the boy, the disciples ask Him privately, “Why could not we cast him out?” (Mark 9:28). Jesus answers with the words of Mark 9:29.
Meaning
Jesus says, “This kind can come forth by nothing, but by prayer and fasting.” The word “kind” refers to the specific type of unclean spirit that possessed the boy. Some translations render it “of this sort,” suggesting that different spiritual challenges may require different levels of spiritual engagement. The disciples had already received authority from Jesus to heal and cast out demons (Mark 6:7), yet they failed here. Jesus does not say they lacked authority; He points to a deeper need: prayerful dependence on God. Prayer is the means by which believers rely on God’s power rather than their own. Fasting intensifies that dependence, as it involves voluntarily setting aside food to focus on God and humble oneself before Him.
Biblical connections
The parallel account in Matthew 17:14-21 includes the same saying, and there Jesus attributes the disciples’ failure to their unbelief (Matthew 17:20). This reinforces that prayer and faith are inseparable in spiritual warfare. Jesus also connects the outcome to faith in Mark 9:19 and 9:23, showing that prayer rooted in faith in Christ is effective. The textual note that some manuscripts omit “and fasting” does not change the core meaning: Jesus emphasizes the necessity of prayer, and fasting is understood as an intensification of prayer—prayer so focused that one sets aside eating.
Application
Mark 9:29 teaches believers several practical lessons:
Faith and spiritual discipline: This passage encourages believers to deepen their faith and cultivate spiritual disciplines like prayer and fasting.
Humility and dependence on God: It reminds us that our strength alone is insufficient to overcome certain challenges. We must acknowledge our dependence on God’s power and seek His intervention.
The significance of spiritual warfare: The mention of demons highlights the reality of spiritual battles and the need to engage in prayer and fasting to address them effectively.
Believers are not to rely on past successes or assumed authority, but must cultivate a lifestyle of prayer and fasting for the most difficult spiritual battles. Christ alone casts out demons by His authority, yet He calls His disciples to participate through prayer.
Reflection
When facing challenges that seem immovable, Jesus’ words invite us to examine our prayer life. Are we depending on our own abilities, or are we seeking God’s intervention with humble, persistent prayer? Fasting reminds us that some victories require a deeper level of spiritual focus and surrender. As we pray, we align ourselves with Christ, who perfectly prayed and fasted, and who empowers His people to stand against spiritual opposition.
