Those who never believed in Jesus Christ were already condemned as John 3:18 testifies. Rejecting the antidote to the poison of sin will not change the outcome.
There is condemnation to a saved believer if they walk after the flesh. God is not mocked. Whatever a man sows, so shall he reaps. Corruption is coming unless they repent.
Romans 8:1 There is therefore now no condemnation to them which are in Christ Jesus, who walk not after the flesh, but after the Spirit....6 For to be carnally minded is death; but to be spiritually minded is life and peace. 7 Because the carnal mind is enmity against God: for it is not subject to the law of God, neither indeed can be. 8 So then they that are in the flesh cannot please God.....
Romans 6:12 Let not sin therefore reign in your mortal body, that ye should obey it in the lusts thereof. 13 Neither yield ye your members as instruments of unrighteousness unto sin: but yield yourselves unto God, as those that are alive from the dead, and your members as instruments of righteousness unto God. 14 For sin shall not have dominion over you: for ye are not under the law, but under grace. 15 What then? shall we sin, because we are not under the law, but under grace? God forbid. 16 Know ye not, that to whom ye yield yourselves servants to obey, his servants ye are to whom ye obey; whether of sin unto death, or of obedience unto righteousness?
Galatians 6:7 Be not deceived; God is not mocked: for whatsoever a man soweth, that shall he also reap. 8 For he that soweth to his flesh shall of the flesh reap corruption; but he that soweth to the Spirit shall of the Spirit reap life everlasting.
Galatians 5:19 Now the works of the flesh are manifest, which are these; Adultery, fornication, uncleanness, lasciviousness, 20 Idolatry, witchcraft, hatred, variance, emulations, wrath, strife, seditions, heresies, 21 Envyings, murders, drunkenness, revellings, and such like: of the which I tell you before, as I have also told you in time past, that they which do such things shall not inherit the kingdom of God. 22 But the fruit of the Spirit is love, joy, peace, longsuffering, gentleness, goodness, faith, 23 Meekness, temperance: against such there is no law. 24 And they that are Christ's have crucified the flesh with the affections and lusts. 25 If we live in the Spirit, let us also walk in the Spirit.
Do note heresies as a work of the flesh which those saved believers participating in the Mass for are in need to repent of from doing the Mass again.
2 Peter 2:19 While they promise them liberty, they themselves are the servants of corruption: for of whom a man is overcome, of the same is he brought in bondage. 20 For if after they have escaped the pollutions of the world through the knowledge of the Lord and Saviour Jesus Christ, they are again entangled therein, and overcome, the latter end is worse with them than the beginning. 21 For it had been better for them not to have known the way of righteousness, than, after they have known it, to turn from the holy commandment delivered unto them.
So there is a consequence but it is not loss of salvation, but loss of the first inheritance of being received as a vessel unto honor in His House to attend the Marriage Supper in Heaven and have a place; a mansion in the city of God. That means unless a believer departs from iniquity, he or she runs the risk of being left behind at the pre great trib rapture event to be received later on as a vessel unto dishonor in His House but still in His House.
1 Corinthians 9:24 Know ye not that they which run in a race run all, but one receiveth the prize? So run, that ye may obtain. 25 And every man that striveth for the mastery is temperate in all things. Now they do it to obtain a corruptible crown; but we an incorruptible. 26 I therefore so run, not as uncertainly; so fight I, not as one that beateth the air: 27 But I keep under my body, and bring it into subjection: lest that by any means, when I have preached to others, I myself should be a castaway.
So if a saved believers that walks after the flesh in reaping corruption and does not depart from iniquity by the time the Bridegroom comes....
Now there is hope for carnal believers caught in bondage... especially when they fear the Lord and wants to be free from that bondage to sin.
1 John 3:3 And every man that hath this hope in him purifieth himself, even as he is pure.....8 He that committeth sin is of the devil; for the devil sinneth from the beginning. For this purpose the Son of God was manifested, that he might destroy the works of the devil.
2 Timothy 4:18 And the Lord shall deliver me from every evil work, and will preserve me unto his heavenly kingdom: to whom be glory for ever and ever. Amen.
That also includes the carnal believer leaning on Jesus for help to put away all provisions for the flesh and cast down every wicked thought and even to help him think on good things.
Romans 13:13 Let us walk honestly, as in the day; not in rioting and drunkenness, not in chambering and wantonness, not in strife and envying. 14 But put ye on the Lord Jesus Christ, and make not provision for the flesh, to fulfil the lusts thereof.
2 Corinthians 10:4 (For the weapons of our warfare are not carnal, but mighty through God to the pulling down of strong holds;) 5 Casting down imaginations, and every high thing that exalteth itself against the knowledge of God, and bringing into captivity every thought to the obedience of Christ; 6 And having in a readiness to revenge all disobedience, when your obedience is fulfilled.
Philippians 4:6 Be careful for nothing; but in every thing by prayer and supplication with thanksgiving let your requests be made known unto God. 7 And the peace of God, which passeth all understanding, shall keep your hearts and minds through Christ Jesus. 8 Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good report; if there be any virtue, and if there be any praise, think on these things. 9 Those things, which ye have both learned, and received, and heard, and seen in me, do: and the God of peace shall be with you.
We can only live this reconciled relationship with God THROUGH Jesus Christ for why the just shall live by faith because that faith is in Him to do it.
Philippians 1:6 Being confident of this very thing, that he which hath begun a good work in you will perform it until the day of Jesus Christ:........1 Being filled with the fruits of righteousness, which are by Jesus Christ, unto the glory and praise of God.
Hebrews 12:1Wherefore seeing we also are compassed about with so great a cloud of witnesses, let us lay aside every weight, and the sin which doth so easily beset us, and let us run with patience the race that is set before us, 2 Looking unto Jesus the author and finisher of our faith; who for the joy that was set before him endured the cross, despising the shame, and is set down at the right hand of the throne of God.
Jude 1:24 Now unto him that is able to keep you from falling, and to present you faultless before the presence of his glory with exceeding joy, 25 To the only wise God our Saviour, be glory and majesty, dominion and power, both now and ever. Amen.