You are not alone. No one had heard of this before the reformation. It’s one of the doctrines developed to attempt to combat the Catholic doctrine of Purgatory. As mentioned in a prior post, it is referred to as the Doctrine of Eternal Security. Which denoms. believe and which don’t I’m not sure. Baptist do. Here are some more scripture passages that go against the ES doctrine.
Col 1:22-23 Key word is provided
22 he has now reconciled in his fleshly body through his death, to present you holy, without blemish, and irreproachable before him, 23 provided that you persevere in the faith, firmly grounded, stable, and not shifting from the hope of the gospel that you heard, which has been preached to every creature under heaven, of which I, Paul, am a minister.
[font=Times New Roman]John 3:16 key word is believes, present tense
John 3:36 need to have obedience with the belief, not by your own mental assent
[font=Times New Roman]Mt 24:13 persevere to the end
2 Tim 2:12 we must persevere*** if we want to reign with Christ.***
Rom 11:22 Paul warned they will be*** cut off ***if the remain in kindness
Heb 6:4-6 people who are sharers in the HS and then fall away from God
1 Cor 9:27 St. Paul talk of fear that he may be disqualified
1 Cor 10:12 St. Paul is warning against being overconfident with a sense of complete security.
Ask you buds to reconcile these passages with their doctrine. Should be interesting. What we believe takes nothing away from what Christ did for us on Calvary. We are sufficiently warned to perserve to the end and not to fall away. As also mentioned in another post, quite ironic that many devote non-Catholics live their lives this way, their doctrine just doesn’t fly.
Peace be with you,