What is the meaning of 1 Corinthians 6:9-11?
The 'unrighteous' are described. (9-10)
The nature of the unrighteous is being described. Drunkards, theives, adulterers, etc. etc.
"And such were some of you". (11) It was also once, you who are saved, a description of you. It was your nature also.
But it is no longer your nature. You have a new nature. Born-again by the Spirit of God. You are righteous by declaration.
If you a believer find yourself in some of these same sins, you are acting contrary to your new nature. If you commit the sin of adultery, you don't become an adulterer. You are a born-again Christian who has committed the sin of adultery. You have acted against who you are.
So, since you are no longer that, quit doing that.
God changes who you are first. Then spends your whole lifetime of ridding you of the sins you fall so easily into.
Lees