And since baptism is the powerful sacrament that it is, with the Holy Spirit working in us through baptism, it predisposes the baptized to hearing and responding favorably to, the full truth when instructed and/or corrected in a particular understanding of faith … true?
As a result, an unbaptized person for example, can’t be called a heretic
The CCC states
2089"*Heresy *is the obstinate post-baptismal denial of some truth which must be believed with divine and catholic faith, or it is likewise an obstinate doubt concerning the same;
Baptism therefore, is the condition. And that goes for ALL baptized… NOT just Catholics but non Catholic as well.
Therefore, when Paul says the following to Titus, he’s talking about an already baptized person
Titus 3:10
“As for a man who is factious (
αἱρετικὸ****ν heretic ), after admonishing him once or twice, have nothing more to do with him, 11 knowing that such a person is perverted and sinful; he is self-condemned.”
Baptism is a powerful sacrament. We can show Protestants, who for the most part don’t recognize it as a sacrament, that besides bestowing grace and the HS on us, It therefore predisposes us to ALL the truth not just some of it, and without a lot of push back to the truth either. After all, the HS we receive in baptism, leads us into all truth. If one fights this grace given them in and through baptism, they fight against the HS as well.
That’s why Catholics should always be ready to instruct, correct, and defend the faith to any and everyone .