Hi perilous,
Thank you for the background to your original question.
What HopePurifies said about repetitive sins, is true. One cannot carry on a lifestyle where the sins identified in Paul's lists of sins (any of his lists) are a regular feature, without putting oneself in danger of being cut off from God permanently, eventually.
Having said that, many individual Christians struggle with certain sins because they don't really see why what they are doing is incompatible with proclaiming Christ as their Saviour. They didn't ever understand that repentance is a turning away from [i]all[/i] sin, whether they had identified them [i]before[/i] (or as they were) coming to the Lord, or, He revealed it to them [u]afterwards[/u], in the way John explains in his first epistle, 1v 8 If we say that we have no sin, [u]we deceive ourselves, [b]and[/b] the truth is not in us[/u].
For many years I didn't understand what John was getting at, but recently it dawned on me he is saying that [i][u]when[/u] the truth is [u]in[/u] us[/i] our sins are revealed to our understanding. Now, God does this as we grow in Him, at a pace we can stand, and with the aim of enabling us to be constructive of being more like Jesus in both our thinking and our 'conversation' (meaning, practical living).
Some verses from Romans 8, with Tyndale's choice of verb, may enable you to settle on a form of words which clears this up Watchman Nee's thought for you. Whenever you're in doubt about what a Christian has written about what I call [i]spiritual dynamics[/i] it is worth going straight to scripture and searching for the places that Christian's key words (in this case 'dead' and 'spirit') are laid out in their more original context. (This is what Jesus did when the Pharisees asked Him about marriage and divorce: He referred them to what God had said at the first.)
Therefore, here is Romans 8
5 For those who live according to the flesh set their minds on the things of the flesh, but those [i]who live[/i] according to the Spirit, the things of the Spirit.
6 For to be carnally minded [i]is[/i] death, but to be spiritually minded [i]is[/i] life and peace.
7 Because the carnal mind [i]is[/i] enmity against God; [b]for it is not subject to the law of God, nor indeed can be[/b].
8 So then, those who are in the flesh cannot please God. ['in' here = [i]given to*[/i]]
9 But you are not in* the flesh but in* the Spirit, if indeed the Spirit of God dwells in you. Now if anyone does not have the Spirit of Christ, he is not His.
10 And if Christ [i]is[/i] in you, the body [i]is[/i] dead because of sin, but the Spirit [i]is[/i] life because of righteousness.
11 But if the Spirit of Him who raised Jesus from the dead dwells in you, He who raised Christ from the dead will also give life to your mortal bodies through His Spirit who dwells in you.
12 Therefore, brethren, we are debtors -- not to the flesh, to live according to [or *] the flesh.
13 For if you live according to [or *] the flesh you will die; but if by the Spirit [u]you put to death the deeds of the body[/u], you will live. [Here 'put to death' = somehow stop doing sin**]
14 For as many as are led by the Spirit of God, these are sons of God.
** In the New Testament there is a clear instruction for [u]us[/u] to [i]do[/i] something about the habitual sins in which we lived. Yes (v 13 above states) the Holy Spirit will [i]help[/i] us, but I believe it is often made by preachers to sound as if the Holy Spirit does the [i]whole work[/i]. He doesn't. We [u]co-operate[/u] with His power, which enables us to break free [u]in our experience[/u].
So, to elaborate on the idea of what we can (and should do) to prevent ourselves continuing to sin, you will find Paul using words and phrases such as 'mortify' (or [i]put to death[/i]), 'put off', and 'lay aside'.
John says 'do [u]not[/u]', or 'do not [u]practise[/u] (sin)' (NASB).
He also has a useful statement which a brother on SI illuminated for me thus:
1 John 3:9
Whoever has been born of God does not sin, for His seed remains in him; and he cannot sin, because he has been born of God.
where 'cannot sin' = [u]can[/u] [b]not sin[/b]
So, it seems clear that Paul is not saying a person immediately loses spiritual LIFE IN CHRIST forever, while they sort out their lives into a format which honours Him at every turn, but, he is not saying either, that this task can be delayed. We are to exhort each other [i]while it is today[/i] because 'today is the day of salvation'.
When I mentioned in my earlier post about taking back the land from the enemy, I was thinking of the way Joshua lead the people [i]back[/i] into the land, to whom God had said privately first
Joshua 1:3
"Every place that the sole of your foot will tread upon [u]I have given you[/u], as I said to Moses.
In the above picture, can you see that the land is already ours, in the Spirit, because of what Christ accomplished through His death and resurrection, but we have to come after Him - with the same faith He had in laying down His life for us - laying down our old (flesh) life for Him - thus laying claim to [u]the practical outworking[/u] of His new life in us, for ourselves?
OK. It's not comfortable! But we can comfort our minds with the thought that this struggle is not new. It's par for the course. None of us is suffering beyond what we are able, as we believe into these truths.
Sorry this was so long. There is more which could be said about Watchman Nee's way of explaining this, but let's start with understanding the weight of what's in scripture.