Sharing the gospel with Catholics involves understanding one of the biggest impediments: their view that church tradition is equal in authority to the Bible. But both the Old and New Testaments warn against adding to God's Word (Deuteronomy 4:2, 12:32; Revelation 22:18-19). Jesus chastized the Pharisees for putting their traditions above the Law God had given them (Mark 7:9-13), and we, too, must not uphold tradition above God's Word. Paul wrote about the authority of Scripture in 2 Timothy 3:16-17. Once Catholics can accept the Bible as the authoritative Word of God, then it's easier to show them that the only mediator between God and human beings is Jesus, not the pope nor a priestly class (Hebrews 4:14-16). Catholics can also be shown Bible passages that indicate that salvation is through grace alone (Romans 4:4-5; Ephesians 2:8-9), which contrasts with Catholic theology which says that good works are required to maintain salvation.
Yet these conversations must be marked by humility, patience, and compassion because truth delivered without love hardens hearts instead of opening them (1 Peter 3:15). The goal is not to attack Catholics or to win arguments but to faithfully point people to the finished work of Jesus Christ, who alone saves completely and eternally.
Priests and nuns in vestments. The rosary. Holy water. Hail Marys. Whenever movies portray Christianity, they seem to choose the Catholic church. That's because no other religion is quite as outwardly religious. But sadly, when you go past the traditions and rituals, what remains is antibiblical beliefs that even many regular Catholics aren't aware of. This means that they are a mission field for the gospel.
But people don't enjoy admitting they're wrong. Many who grew up Catholic have been raised to believe that they are the one true church and that tradition has equal authority to Scripture. They believe the sacraments are means of grace. They believe the pope is the successor of the apostle Peter and the spiritual leader of the Church, entrusted with special authority to guide the Church in matters of faith and doctrine. They believe they can ask Mary and the saints to pray for them, interceding before God on behalf of the Church. None of these things are biblical.
At the same time, many Catholics already believe in Jesus, respect Scripture, and desire to follow God, so we should begin sharing the gospel by listening carefully and building trust. Then we can point conversations to the sufficiency of Christ and the hope of salvation by grace through faith. Instead of attacking traditions or assuming someone does not know God, we can ask thoughtful questions, open and study God's Word together, and encourage people to place their full confidence in Jesus alone rather than in religious performance or rituals.
Our tone matters just as much as our theology because harshness often closes doors that compassion could open. The goal is not to win an argument. It's to point Catholics to the finished work of Christ, the authority of God's Word, and the freedom of salvation by grace alone through faith alone in Jesus alone.