A church resembles an airline in that a church tells people: profess and obey what we teach and we will get your soul to heaven, and an airline says: fly our planes and we'll get you safely to your destination. What exactly does Christianity teach? Roman Catholics say: obey Rome and Rome will get you to heaven. Protestant Fundamentalists say Rome teaches heresy and leads people to perdition. More
Christians are under a lot of pressure to say we have this Divine Law / new covenant mentioned in Jeremiah 31. 31-34 written on our hearts, because, if one says he doesn't have God's Law written on his heart then he's saying he is not a True Christian, and therefore he has no hope for attaining heaven. But if one insists that one does have the Divine Law written on ones heart then one is saying one is a competent religious teacher: one knows how to explain the True Faith / Gospel of Jesus Christ / Divine Law, and one is insisting that one does not teach a single heresy. A heresy is an error which is a serious enough error to drags souls to perdition. There's some ambiguity. It's not so easy to draw a line between errors which lead straight to perdition and errors which don't, so it's best to just avoid all theological errors. John14. 23-26, John 15. 6, Galatians 1. 8-12, 1 Corinthians 6. 9-10 are clear enough. Rome says it's a big sin to say Mary was not ever-Virgin. But the scriptures say Jesus had brothers and sisters. Well, if the Popes have the power to bind and loose then, evidently, Mary is ever-Virgin. If you have God Law written on your hearts, recall Jeremiah 31. 31-34, then you would know if the Popes have inherited the power to bind and loose, or not. In Matthew 16. 13-19 Jesus tells us He has founded His Church on a rock and the gates of hell will not prevail against this Church. Roman Catholics are quite convinced that the Roman Catholic Church is God's True Church. In 2 Thess 2 St. Paul mentions a falling away, and a man of sin, and strong delusion. So, if Rome is God's True Church, then everyone who rejects Rome is suffering a delusion. But if Rome has fallen away, fallen into heresy, then the Roman Catholics are suffering a delusion.
2 Thess 2 deals with a man of sin / son of perdition, presumably this is the Antichrist of 1 John 2. 18. Revelation 14. 6-11 deal with 3 angels from heaven. So, for instance, if one is delusional on the issue of the Roman Catholic Church, then one might be delusional enough to be led astray by the deceptions of the Antichrist, and one might be delusional enough to think 3 angels from heaven are 3 angels from hell.
You just can't get anywhere if you are delusional about Rome. Suppose Rome is God's True Church. Suppose the Popes have the power to bind and loose. Then Rome will get your soul to heaven if you could just have enough sense to always obey God's True Church - Rome. Or suppose Rome is not God's True Church, suppose Rome has fallen into heresy, then Rome leads people to perdition, so get away from the Roman Catholic Church!