How do we know that prayer is effective in witnessing?

Prayer is a fundamental aspect of witnessing effectively, as it acknowledges that only God can change hearts. In 1 John 5:14-15, Scripture reassures believers that when they ask anything according to God's will, He hears them. This includes prayers for loved ones who do not know Him. Recognizing the futility of arguing or condemning others, believers are encouraged to pray without ceasing (1 Thessalonians 5:17), trusting in God's ability to intervene. This reliance on prayer reflects a humble attitude that recognizes the limitations of human effort in spiritual matters.