Witnessing to Catholics—what is the key?

To best know how to witness to Catholics, it is helpful to understand some of the factors that make Catholics resistant to the idea of being “born again.” But first, it’s wise to remember that Peter instructs Christians to defend biblical truth in a kind and loving manner: “But in your hearts revere Christ as Lord. Always be prepared to give an answer to everyone who asks you to give the reason for the hope that you have. But do this with gentleness and respect” (1 Peter 3:15, emphasis added).

To begin, the Roman Catholic Church claims that its teachings take precedence over the Bible. Because of this, many Catholics are encouraged to rely on the Church’s teaching authority rather than personally examining the biblical basis for its doctrines. As a result, some may not be able to explain from Scripture why they believe what they do. Therefore, Christians witnessing to Catholics must be prepared to share the basic truths of the gospel in a winsome, gracious, and gentle manner, speaking the truth in love (Ephesians 4:15).

In contrast, a confrontational approach to witnessing can unintentionally cause Catholics to become defensive and put up walls, just like anyone else. Many Catholics have been taught to expect this from Protestants. Instead, believers should follow Paul’s exhortation to “be wise in the way you act toward outsiders; make the most of every opportunity. Let your conversation be always full of grace, seasoned with salt, so that you may know how to answer everyone” (Colossians 4:5–6). Therefore, it is usually better to gently point them to Scripture and its authority as God’s Word, remembering never to underestimate its power to change a person’s heart (Hebrews 4:12).

The simplicity of the gospel is often what speaks most powerfully to Catholics. Rather than beginning with debates over doctrine, point them to the message of salvation through faith in Christ. Many Catholics have been taught to approach God through the church’s sacramental system, priests, and saints. In contrast, Scripture emphasizes the direct and sufficient work of Christ and calls believers to a simple, wholehearted faith in Him.

Paul expressed his desire that believers remain devoted to “the simplicity and purity of devotion to Christ” (2 Corinthians 11:3, NASB). Likewise, Jesus extends His invitation freely to all: “Let the one who wishes take the free gift of the water of life” (Revelation 22:17), and John declares, “Whoever has the Son has life” (1 John 5:12). This simple, loving message often resonates deeply with those who have spent years striving to earn God’s favor through religious works.

Reaching the heart of a Catholic is often a gradual process. Rather than trying to win an argument, seek to build trust and encourage kind conversation. As questions arise about what they have been taught, point them to the teachings of Scripture. Many people become more receptive to the gospel when they recognize their need for biblical answers and begin searching for them. When those opportunities come, be prepared to answer with God’s Word. Lasting conviction comes as a person sees the truth of Scripture for themself through the work of the Holy Spirit.

Of course, those who witness to Catholics must themselves be grounded in God’s Word and devoted to prayer. We should approach every conversation with humility, compassion, and a genuine love for the other person, relying on the Holy Spirit to guide our words and actions. Our prayer should be that God would prepare the person’s heart and give us wisdom to speak with grace, truth, and clarity: “Lord, You know this person’s heart and understand every need. Give me the words to say, and use Your Word to draw him or her to Yourself.”

As an encouragement, here is a testimony from a former Catholic: “I recall what ministered to me was first hearing the Word several times and then the awesome realization that I could know the Lord personally. For me, all the other Catholic doctrines that were wrong fell away gradually after I was born again and continued to read the Word.”