Walking in the Spirit shows that person genuinely belongs to God though as the Holy Spirit is the seal given to us. If you've continually resisted and departed from walking with the Holy Spirit to the end and died, you're no longer qualified to be saved, even if you continued to go to church, read your Bible, and socialize in Christian circles.
Paul did not seem to think the original belief of the Corinthians would profit them if they did
not continue in the faith
. Paul says they would have
believed in vain if they do not hold fast to what he preached to them.
In
John 8:31 Jesus said to the Jews which believed on him,
If ye continue in my word, then are ye my disciples indeed. We must continue in the faith as Hebrews 3:6 and 14 also tells us.
We are his house, if we hold fast the confidence and the rejoicing of the hope firm unto the end. ~ Hebrews 3:6
We are made partakers of Christ, if we hold the beginning of our confidence steadfast unto the end. ~ Hebrews 3:14
And you don't seem to want to do that. This is why I've said that OSAS people don't want to abide or walk in the Spirit because they don't want God to be the Lord of their lives. They still want to do things their own way, but want God's salvation for the at the same time. You won't get that. It just doesn't work that way.