1st Thessalonians 4:2-8 doesn’t sound to me like God is doing it all:

2 For ye know what commandments we gave you by the Lord Jesus.

3 For this is the will of God, even your sanctification, that ye should abstain from fornication:

4 That every one of you should know how to possess his vessel in sanctification and honour;

5 Not in the lust of concupiscence, even as the Gentiles which know not God:

6 That no man go beyond and defraud his brother in any matter: because that the Lord is the avenger of all such, as we also have forewarned you and testified.

7 For God hath not called us unto uncleanness, but unto holiness.

8 He therefore that despiseth, despiseth not man, but God, who hath also given unto us his holy Spirit.

Paul’s all like: “Jesus gave us some commandments to give to you for your sanctification. So don’t be like a Pagan and ignore them. If you despise them, you are despising the Holy Spirit.” Isn’t that what he’s saying?

9 But as touching brotherly love ye need not that I write unto you: for ye yourselves are taught of God to love one another.

So the way God works in our sanctification is not in doing it for us but in teaching us how to do it.

This is more clear again in comparing passages like Titus 2:10-14:

10 Not purloining, but shewing all good fidelity; that they may adorn the doctrine of God our Saviour in all things.

11 For the grace of God that bringeth salvation hath appeared to all men,

12 Teaching us that, denying ungodliness and worldly lusts, we should live soberly, righteously, and godly, in this present world;

13 Looking for that blessed hope, and the glorious appearing of the great God and our Saviour Jesus Christ;

14 Who gave himself for us, that he might redeem us from all iniquity, and purify unto himself a peculiar people, zealous of good works.

A few times Paul uses the term “sanctification of the Spirit” — but does the Spirit do this by remote controlling us? Here, again, it seems he does it by teaching us. But Paul clearly tells us we must implement the teaching. Otherwise, Paul’s admonition to be “not purloining, but shewing all good fidelity” would be an admonition to the Holy Spirit Himself(!) rather than to us!