You have been dancing around the issue that I raised. You have a need to change the definition of slave depending on the circumstance. You like its meaning when it is applied to lost people. But you need to change its meaning when applying it to saved people. And here you are trying to create some kind of distinction between what makes a person a slave of sin based on whether he lived before or after pentecost. That distinction is invalid because sinning still makes people slaves to sin. Yet, even if you were right on that point, you would still have a problem with
Romans 6:18 which says we have become "slaves of righteousness" and
Romans 6:22 which says we have become "slaves of God". Your definition of
slave changes in these verses because you allow for unrighteousness and ungodliness for slaves of righteousness who are also slaves of God. And I bring this up, not to criticise, but to get you to thinking about the inconsistency and what might clear it up.
so far, so good.
While it is true that He guides us, what you have not stated is that the Holy Siprit coming into our hearts makes us a new creation (
2 Cor 5:17). He separates us and removes us from the flesh (
Ro 10:9), joins us with Christ (
1 Cor 6:17), and makes us one Spirit with Him (
1 Cor 6:17). This new creature (the new man) is "created according to God, in true righteousness and holiness" (
Eph 4:24).
The fact that we are a new creation, separated and removed from the flesh, joined with Christ, and are one spirit with Him is what makes us sanctified. We are have been culled out from among the lost, cleaned up, and set aside for His service. And this thing that He did for us happens in the heart. We are not in the flesh but in the Spirit because He He separated us from Sin and Joined us to Christ. That is our sanctification.
Please address why you need the definition of slave to change when we talk about being slaves of God (see comments above).
I'm trying to help you understand that the flesh is corrupt and cannot be reformed but the redeemed spirit is "truly righteous and holy" and connot be corrupted. Not knowing these things is why you change the definition of slave to fit the context and is a big reason why you think sanctification is progressive. I know this is a big bite of spiritual food to offer you. Maybe you could just start by investigating why you need to run away from Jesus' statement that whoever commits sin is a slave of sin.