(Paul) is very clearly speaking of himself saying "But I keep under my body"... He is saying that HE has responsibility to not walk after the flesh...
Absolutely correct, but this same Paul also says the following:
"...we are His workmanship, created in Christ Jesus for good works, which God prepared beforehand, that we should walk in them..." (Ephesians 2:10).
"I am sure of this, that He Who began a good work in you will bring it to completion at the day of Jesus Christ... work out your own salvation with fear and trembling, for it is God Who works in you, both to will and to work for His good pleasure" (Philippians 1:6, 2:13).
"...we have not ceased to pray for you, asking that you may be filled with the knowledge of his will in all spiritual wisdom and understanding, so as to walk in a manner worthy of the Lord, fully pleasing to Him: bearing fruit in every good work and increasing in the knowledge of God; being strengthened with all power, according to his glorious might, for all endurance and patience with joy;..." (Colossians 1:9-11)
"...may the Lord make you increase and abound in love for one another and for all..." (1 Thessalonians 3:12).
"...we always pray for you, that our God may make you worthy of his calling and may fulfill every resolve for good and every work of faith by his power, so that the name of our Lord Jesus may be glorified in you, and you in him, according to the grace of our God and the Lord Jesus Christ" (2 Thessalonians 1:11-12).
"...the desires of the flesh are against the Spirit, and the desires of the Spirit are against the flesh, for these are opposed to each other, to keep you from doing the things you want to do. But if you are led by the Spirit, you are not under the law. Now the works of the flesh are evident: sexual immorality, impurity, sensuality, idolatry, sorcery, enmity, strife, jealousy, fits of anger, rivalries, dissensions, divisions, envy, drunkenness, orgies, and things like these. I warn you, as I warned you before, that those who do such things will not inherit the kingdom of God. But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, 23 gentleness, self-control; against such things there is no law. And those who belong to Christ Jesus have crucified the flesh with its passions and desires. If we live by the Spirit, let us also keep in step with the Spirit" (Galatians 5:17-25).
So
God does this in us, BBJ. We do His will, and very much willingly, but
because we have the Holy Spirit.
Because we have been born again of the Spirit and are thus of God, and
God is our Father, our will is now to do His will,
rather than to do the will of our former father, the devil. This is God's doing, and as He says to the Philippians (above),
"He Who began a good work in us will..." will, not might ~
"...bring it to completion at the day of Christ."
and if he fails to do that he will become reprobate.
Yes, but if he fails, he really always was reprobate, As Jesus tells a group of Jews in John 8:
"If God were your Father, you would love Me... You are of your father the devil, and your will is to do your father’s desires... Whoever is of God hears the words of God. The reason why you do not hear them is that you are not of God..."
What you say is not "bad" but would be more correct, really if you were to rephrase that and say, "if he fails to do that he will prove to all ~ and even to himself ~ that he is reprobate." As John says in 1 John 2:18-20 (cited in my previous post):
"...many antichrists have come. Therefore we know that it is the last hour. They went out from us, but they were not of us; for if they had been of us, they would have continued with us. But they went out, that it might become plain that they all are not of us. But you have been anointed by the Holy One..."
Had he not repented and returned to his Father he would have gone to hell for eternity
Right, but it is the Holy Spirit Who convicts, and leads us to true repentance.
That's a doctrine of demons right there
Pish. You misunderstand. You don't think you do, I'm sure, but you do.
One cannot depart from something they were never a part of to begin with.
It depends on the sense in which one understands this departure. It's not in the sense of having
had true faith and dispensing of it or throwing it away, but rather experiencing the benefits of it but realizing at some point that it was never in them, never their true heart.
So called once saved always saved doctrine teaches the same thing satan taught Adam and Eve in the garden which is - you can disobey God and sin against Him and still be saved.
Yeah, thinking this to be true of the "once saved always saved" doctrine is the problem. That it's somehow a "license to sin," which... is absolutely not true... perish the thought. The issue is not understanding the true scope of the change that we who are born again of the Spirit have experienced... the change in our spirit, and having the Holy Spirit in us, and the power in that, the power not of us, in and of ourselves, but the power of God.
Grace and peace to you, Big Boy.