I’m glad I decided to “hit the forums” this afternoon, since I can finally contribute to something that I have at least some knowledge about, having dealt with such individuals myself.
If you want to debate scripture, then I STRONGLY recommend that you find the verses that can only be interpreted quite literally (Examples below), and STUDY, STUDY, STUDY the surrounding context and most importantly UNDERSTAND what the message is. Use Bible Commentaries from both “sides” as necessary to gain a more rounded opinion.
You’ll probably find when using scripture that some Protestants will either flat-out deny what you are telling them (Unless you SHOW them the verse(s)), or look up the reference and tell you, “That verse was taken out of context by so-and-so, therefore, they (+ you and Catholicism) are wrong.”
Unless you are very competent with the scripture, which many of us (Including Non-Denominational/Protestant) are not, then stay WELL CLEAR of biblical debate, since you will only hurt, scare, upset or disappoint these people - which could very well result in this person (esp. if they are young) deserting their faith altogether. Why? Well, they will feel deceived, and misinformed and worried about who has the answers.
As an FYI, a couple of verses you can use in debate that debunk two common myths. (With thanks to member “PJM” for educating me on such matters):
~ John 6 (particularly towards the end) explains,
“I am the living bread that came down from heaven. If anyone eats of this bread, he will live forever. And the bread that I will give for the life of the world is my flesh.” (John 6:51 ESV). This defends Christ’s Real Presence in the Holy Eucharist. We see the truth in this as many of Christ’s followers desert him because what he said was “hard saying,” they cannot accept his miracle or his promise.
~ In Matthew 16 Jesus gives his disciples the power (and/or authority) to forgive the sins of people, therefore, this is evidence for Confession,
“He said to them, “But who do you say that I am?” Simon Peter replied, “You are the Christ, the Son of the living God.” And Jesus answered him, “Blessed are you, Simon Bar- Jonah! For flesh and blood has not revealed this to you, but my Father who is in heaven. And I tell you, you are Peter, and on this rock I will build my church, and the gates of hell shall not prevail against it. I will give you the keys of the kingdom of heaven, and whatever you bind on earth shall be bound in heaven, and whatever you loose on earth shall be loosed in heaven.” (Mt 16:15-19 ESV).
I am 100% certain there are more verses like this that parallel the two gospels I have included above, and remembering the Gospels are a GREAT place to start - since they seem to be the grounding of the Protestant belief. If you really want to win arguments, above is what you can use to break the foundation of their belief, and thus debunk it from the outset.
But, as I said before, do be careful with the younger folk, as they may see deception in what they’ve been taught, and abandon their faith, questioning who has the right answers.
However, I’ve used the above (particularly Matthew) or shown people these verses and gotten the excuse, “out of context” or “You can’t get that much out of 4 verses” from said persons. It can be frustrating, so be patient (No pressure) fand remember that only God can ultimately change their hearts.
My recommendation: Show the truth of the Catholic faith by your life (Live by example), including your works and devotion to God.
If you are presented with “these people” regularly, pray much and prepare a “repertoire” of Bible references and information that you can use to refute people’s ill-conceived ideas about the Church. Speak with your local Priest, find apologetics.
Most importantly, if this person is in your age bracket (i.e. It isn’t Adult vs. Child), develop a relationship with this person, so they can see your life, and how you interact with your faith, and develop trust in your belief. You might find the questions are more forthcoming, and that discussion you have are responded to “better.”
God Bless You for trying, and I hope all goes well for you!