Nonetheless, it is the Holy Spirit who ultimately makes the truth of Christianity certain in the hearts of believers (1 Corinthians 2:12–13). He gives us absolute confidence in both God’s Word and God’s Son, assuring us of our salvation and our heavenly hope (Romans 8:14–17). As Josh McDowell and Don Stewart explain, “To those outside the Christian faith, Christianity can be shown to rest on strong evidence and have a high degree of probability for its truth claims. But when a person becomes a Christian,