What can be done about unbelief according to the Bible?

The biblical response to unbelief emphasizes reliance on God's sovereignty and grace. Believers are encouraged to cry out to God, just as the father of the boy with an unclean spirit did in Mark 9:24, 'Lord, I believe; help my unbelief!' This demonstrates the heart of a true believer—a recognition of human weakness and a desperate need for God's help to maintain faith. Romans 10:17 affirms that 'faith comes from hearing, and hearing through the word of Christ', pointing to the necessity of the gospel in producing faith. Thus, believers are called to pray for themselves and others, asking God to reveal Christ’s truth and grant the gift of faith. In doing so, they acknowledge that belief is ultimately a work of divine grace, affirming their dependence on God.