Duckybill,
When lookingat the book of 1 Corinthians, it is helpful to know what problem Paul wasaddressing, as well as the parties involved. The primary problem was not that the Christians at Corinth were engagingin sinful acts (they were, and Paul was concerned, but that was not the biggestproblem he had with them).
The rebukePaul was giving was about the saints taking other saints to a court ofunbelievers. He notes that the thesaints would judge the world as well as angels. That noted, it was a terrible misgiving that they couldn’t resolve theirproblems within the confines of their own community (the believers). Paul was not only mad that they were going tocourt in front of unbelievers, but that they were arguing in the firstplace. This is all found in 1Corinthians 6:1-8.
Here areverses 9-10, as you noted (I quote from the KJV):
1 Cor6:9-10 Know ye not that the
unrighteous shall not inherit thekingdom of God? Be not deceived: neither fornicators, nor idolaters, noradulterers, nor effeminate, nor abusers of themselves with mankind,
10 Nor thieves, nor covetous, nor drunkards, norrevilers, nor extortioners, shall inherit the kingdom of God.
There aretwo parties here: the unrighteous(unbelievers) and the righteous (the saints). It is pointed out what the unrighteous do. Paul is against those things, and later weshall see that he says the saints shouldn’t do those things. However, the main point is not on the thingsthat the unrighteous do, but the act of going to court in front of those who were unrighteous.
In verse 11Paul notes:
“And suchwere some of you: but ye are washed, butye are sanctified, but ye are justified in the name of the Lord Jesus, and bythe Spirit of our God.”
This versedoesn’t say that the saints of Corinth quit sinning. Obviously they didn’t, but through it allthey were still saints. They didn’t fallfrom grace because what they did because their salvation was settled! Doing these things in the flesh was not goingto take that away, but going to law before unbelievers and the defrauding oneanother was going to without correction.
The nextverse shows that the problem must not have been that they were fornicators,idolators, etc. in the flesh. Again, theproblem is fellowship with unbelievers and not being able to resolve and/or forgiveconflicts within the Christian community. Here’s verse 12:
“All thingsare lawful unto me, but all things are not expedient: all things are lawful forme, but I will not be brought under the power of any.”
This ispretty clear in context to verses 9 and 10. All those things listed when noted as fleshly sins are lawful to thesaints. Paul is noting that yes they arecovered by grace through faith. It isnot an excuse to do them, but it is a rebuke in that Paul also says they aren’texpedient and they should not be brought under their power (or under theircontrol – he wouldn’t become addicted to them or let them control his life).
In verse 12he says, “meets for the belly and the belly for meats: but God shall destroyboth it and them.” In other words, sinand the flesh God is going to destroy. Neither of them shall inherit the Kingdom of God. The second part of this verse he refers tofornication and “the body”. We candiscuss it more if you like, but he is not talking about sexual fornication,but rather false fellowship that the Body of Christ (the Christian community asa whole) with unbelievers.
I am not saying the sins listed in verse 9 and10 went unrebuked by Paul. They were,but again it was not the main point. However, even though Paul says they weren’t expedient and Christiansshouldn’t be under their control, it still remains that all things werelawful.
One finalstatement on this topic: Yes I dobelieve that grace through faith is that strong! There is a process to getting faith, and yesit does include repentance. But evenwith faith and grace you are still living in the flesh and you are still asinner. However, grace covers ALL sin

ast, present and future; intentional and unintentional, the sins you repentdaily from and (if you repented correctly) even the ones you didn’t repentdaily from. I will talk more about thatin another post.