Do you not know that the unrighteous will not inherit the kingdom of God? Do not be deceived. Neither fornicators, nor idolaters, nor adulterers, nor homosexuals, nor sodomites, nor thieves, nor covetous, nor drunkards, nor revilers, nor extortioners will inherit the kingdom of God. -1 Cor 6:9-10This commonly quoted passage in 1 Cor 6 concerning (among other things) sexual sin and "inheriting the kingdom" does not involve the free gift of eternal life. That is a dangerous path to take and I see it all the time. Do not conflate "inheriting the kingdom" with the free gift, by grace, of life through his name. If all you have is a saved/lost or a heaven/hell understanding of scripture, you will not get very far.
Now the body is not for sexual immorality but for the Lord, and the Lord for the body. And God both raised up the Lord and will also raise us up by His power. Do you not know that your bodies are members of Christ? Shall I then take the members of Christ and make them members of a harlot?
In this passage we see that the members of the church at Corinth had been guilty of homosexuality as well as many other sins, but they had been converted. The homosexuality is spoken of in the past tense.
-David Cloud (Excerpt, Way of Life Literature)
I say then: Walk in the Spirit, and you shall not fulfill the lust of the flesh. For the flesh lusts against the Spirit, and the Spirit against the flesh; and these are contrary to one another, so that you do not do the things that you wish. But if you are led by the Spirit, you are not under the law. Now the works of the flesh are evident, which are: adultery, fornication, uncleanness, lewdness, idolatry, sorcery, hatred, contentions, jealousies, outbursts of wrath, selfish ambitions, dissensions, heresies, envy, murders, drunkenness, revelries, and the like; of which I tell you beforehand, just as I also told you in time past, that those who practice such things will not inherit the kingdom of God. -Gal 5:16-22
Applying right division to these Acts Age passages, we see that these may lose a place in the coming earthly kingdom (which we have covered numerous times). They will not "inherit the kingdom of God." Since one cannot lose a free gift and since grace and works are mutually exclusive in terms of the gift, we must not try to equate inheriting the kingdom with having eternal life.
And I say to you that many will come from east and west, and sit down with Abraham, Isaac, and Jacob in the kingdom of heaven. But the sons of the kingdom will be cast out into outer darkness. There will be weeping and gnashing of teeth. -Matt 8:11-12
What then shall we say that Abraham our father has found according to the flesh? For if Abraham was justified by works, he has something to boast about, but not before God. For what does the Scripture say? “Abraham believed God, and it was accounted to him for righteousness.” Now to him who works, the wages are not counted as grace but as debt. But to him who does not work but believes on Him who justifies the ungodly, his faith is accounted for righteousness, just as David also describes the blessedness of the man to whom God imputes righteousness apart from works: “Blessed are those whose lawless deeds are forgiven,And whose sins are covered; Blessed is the man to whom the Lord shall not impute sin.” -Romans 4
Was not Abraham our father justified by works when he offered Isaac his son on the altar? Do you see that faith was working together with his works, and by works faith was made perfect? And the Scripture was fulfilled which says, “Abraham believed God, and it was accounted to him for righteousness.” And he was called the friend of God. You see then that a man is justified by works, and not by faith only. -James 2
Therefore, leaving the discussion of the elementary principles of Christ, let us go on to perfection... But, beloved, we are confident of better things concerning you, yes, things that accompany salvation... And we desire that each one of you show the same diligence to the full assurance of hope until the end, that you do not become sluggish, but imitate those who through faith and patience inherit the promises. -Hebrews 6:1,9,11-12
For when God made a promise to Abraham, because He could swear by no one greater, He swore by Himself, saying, “Surely blessing I will bless you, and multiplying I will multiply you.” And so, after he had patiently endured, he obtained the promise. -Hebrews 6:13-15
By faith Abraham obeyed when he was called to go out to the place which he would receive as an inheritance. And he went out, not knowing where he was going. By faith he dwelt in the land of promise as in a foreign country, dwelling in tents with Isaac and Jacob, the heirs with him of the same promise; for he waited for the city which has foundations, whose builder and maker is God. -Hebrews 11:8-10
Yet indeed I also count all things loss for the excellence of the knowledge of Christ Jesus my Lord, for whom I have suffered the loss of all things, and count them as rubbish, that I may gain Christ and be found in Him, not having my own righteousness, which is from the law, but that which is through faith in Christ, the righteousness which is from God by faith; that I may know Him and the power of His resurrection, and the fellowship of His sufferings, being conformed to His death, if, by any means, I may attain to the out-resurrection from among the rest of the dead. Not that I have already attained, or am already perfected; but I press on, that I may lay hold of that for which Christ Jesus has also laid hold of me. Brethren, I do not count myself to have apprehended; but one thing I do, forgetting those things which are behind and reaching forward to those things which are ahead, I press toward the goal for the prize of the upward call of God in Christ Jesus. Therefore let us, as many as are mature, have this mind; and if in anything you think otherwise, God will reveal even this to you. Nevertheless, to the degree that we have already attained, let us walk by the same rule, let us be of the same mind. -Phil 3
There are dire warnings for Christians all through scripture. Too often some warnings, given to Christians, are attributed to unbelievers. But God has but one message to unbelievers: God has been reconciled to you, you just need to be reconciled to God (1 Cor 5:17-18).
Passages like "the enemies of the cross of Christ" and those "whose god is their belly," refer to Christians just as 1 Cor 6 and Peter's admonition not be charged as a murderer, thief, or evil-doer refer to Christians. Those who abandoned Paul in Asia were Christians (2 Tim 1:15).
If you want to argue that 1 Cor 6 concerns unbelievers, you are dangerously close to denying Christ. The context is clear. Paul is admonishing Christians. After the list of disqualifying sins, Paul writes this:
“I have the right to do anything,” you say—but not everything is beneficial. “I have the right to do anything”—but I will not be mastered by anything. You say, “Food for the stomach and the stomach for food, and God will destroy them both.” The body, however, is not meant for sexual immorality but for the Lord, and the Lord for the body.Who says those things? Christians. Whose body is meant for the Lord? This can only mean Christians. We can be disqualified from rewards, the prize, and crowns. We may "become disqualified" (1 Cor 9:27). We may make a "shipwreck" of our faith (1 Tim 1:19).
We warn Christians about walking in the flesh and according to its lusts. We can't tell unbelievers to walk in the new nature (spirit), because they don't have a new nature.
Ironically, many Christians become puffed up in the flesh because they use passages like 1 Cor 6 to teach that they are either incapable of such sins or they are somehow maintaining their salvation by not falling into "habitual sin." Pride is a sin as well.
Paul warns Timothy when he is appointing elders that he should avoid novices, "lest being puffed up with pride he fall into the same condemnation as the devil..." (1 Tim 3:6). The same condemnation as the devil? Yes. But since this is clearly for believers and involves pride and not sex (so we can't point fingers), this verse is not taught in the same way 1 Cor 6 is taught.