Would at least agree doctrinal errors are deadly serious, when they involve anybody putting lying, cultish teachings and errors of man in a position of preeminence over scripture truth, deadly serious for anybody promoting what are lying doctrines of demons. You may as well be calling God a liar. (Like what goes on in most all threads here.)
Unless a person is a real baby in Christ, with much to learn beyond the basic gospel of salvation, there’s no evidence any adult, long in error, is saved. The Holy Spirit leads into all truth, John 16:13. The Holy Spirit does not fail in this. I have, personally, heard the witness of many who came out of cults and such, were led out of error by the Spirit after they actually repented and got saved, and now understand scripture doctrine the same as other true brothers and sisters in Christ.
You know something else? No mature, born again Christian is fooled by any of you tares. We know who and what you are. You can’t very well go around, stumbling around in the dark, telling stupid, big lies and claiming you can see, and you can only ever fool the other blind. Have you even seen one true child of God trade the truth for your lies? Has any authentic Christian once said, "You're right! That clear scripture can't be true! We shouldn't believe our lying eyes." Or, in fact, do only other deluded ever sit down to dinner with you at that cult table, like some pack of wolves? You don't fool anybody not already fooled, are just the damned preaching to other damned. Luke 6:39, John 10:27-28.
A person entrenched in, let’s say, years of error and false doctrine? Deadly serious, serious as Hades itself, and they'd better thoroughly learn what repent means, before that last heartbeat, that could come at any second! As deadly as serous as this:
Matthew 7
13 Enter ye in at the strait gate: for wide is the gate, and broad is the way, that leadeth to destruction, and many there be which go in thereat:
14 Because strait is the gate, and narrow is the way, which leadeth unto life, and few there be that find it.
15 Beware of false prophets, which come to you in sheep's clothing, but inwardly they are ravening wolves.
16 Ye shall know them by their fruits. Do men gather grapes of thorns, or figs of thistles?
17 Even so every good tree bringeth forth good fruit; but a corrupt tree bringeth forth evil fruit.
18 A good tree cannot bring forth evil fruit, neither can a corrupt tree bring forth good fruit.
19 Every tree that bringeth not forth good fruit is hewn down, and cast into the fire.
20 Wherefore by their fruits ye shall know them.
21 Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven.
22 Many will say to me in that day, Lord, Lord, have we not prophesied in thy name? and in thy name have cast out devils? and in thy name done many wonderful works?
23 And then will I profess unto them, I never knew you: depart from me, ye that work iniquity.
24 Therefore whosoever heareth these sayings of mine, and doeth them, I will liken him unto a wise man, which built his house upon a rock:
25 And the rain descended, and the floods came, and the winds blew, and beat upon that house; and it fell not: for it was founded upon a rock.
26 And every one that heareth these sayings of mine, and doeth them not, shall be likened unto a foolish man, which built his house upon the sand:
27 And the rain descended, and the floods came, and the winds blew, and beat upon that house; and it fell: and great was the fall of it.
Revelation 3
14 And unto the angel of the church of the Laodiceans write; These things saith the Amen, the faithful and true witness, the beginning of the creation of God;
15 I know thy works, that thou art neither cold nor hot: I would thou wert cold or hot.
16 So then because thou art lukewarm, and neither cold nor hot, I will spue thee out of my mouth.
17 Because thou sayest, I am rich, and increased with goods, and have need of nothing; and knowest not that thou art wretched, and miserable, and poor, and blind, and naked:
18 I counsel thee to buy of me gold tried in the fire, that thou mayest be rich; and white raiment, that thou mayest be clothed, and that the shame of thy nakedness do not appear; and anoint thine eyes with eyesalve, that thou mayest see.
19 As many as I love, I rebuke and chasten: be zealous therefore, and repent.
20 Behold, I stand at the door, and knock: if any man hear my voice, and open the door, I will come in to him, and will sup with him, and he with me.
21 To him that overcometh will I grant to sit with me in my throne, even as I also overcame, and am set down with my Father in his throne.
22 He that hath an ear, let him hear what the Spirit saith unto the churches.
Revelation 21:8 But the fearful, and unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burneth with fire and brimstone: which is the second death.
