The two nature's which every believer possess does not even come close to ignore grace~not sure why you think this.
"the fact that we are 'not yet' the completed beings that God spoke into existence"~Our new man is, yet we still live in a body of sin and death. God does nothing with our old man, but will destroy it, replace it with a body like Christ now possess.
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'not yet' the members of the Bride of Christ~never said we were not, of course we are, our life is now hid with Christ in God~very safe place to be. Colossians 3:3.
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What we are, is, IN CHRIST. Our whole person is in Him"~ This is true now legally in our new man. One day, it will be visibly true eternally.
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I don't deny the war and the 'old man' is still there. But I've got a problem with the inferences people will draw from the notion of 'two natures' and 'two wills'. If you do not deny this, then pray to tell me how do you account for this warfare, if there are not two natures with every child of God. Please consider:
Galatians 5:16 ~ This I say then, Walk in the Spirit, and ye shall not fulfil the lust of the flesh.
What does it mean to walk in the Spirit? This question and its answer should be important. This walking in the Spirit is not some mysterious phenomenon that is hard to figure out. It is only possible for those born again and baptized (
Jn 7:37-39;
Acts 2:38;
5:32).
It is a choice to walk in the Spirit, for Paul directed believers to do it (5:25;
Eph 5:18). It is doing those things taught and required by the Holy Spirit of God, which can be added to faith (5:22-23; 6:8;
Rom 12:1-2;
Eph 5:8-10;
II Pet 1:5-8). It is not doing sinful things that grieve and quench the Spirit (
Eph 4:30;
I Thess 5:19). The simple but stark contrast is obvious here – crucify the flesh and walk in the Spirit. It means to put off the old man and put on the new man (
Eph 4:20-24;
Col 3:5-15).
There are two principles in every child of God, and we choose one and reject the other. We cannot do it perfectly, but we are certainly not at the whims of our flesh (5:17).
Galatians 5:17 ~ For the flesh lusteth against the Spirit, and the Spirit against the flesh: and these are contrary the one to the other: so that ye cannot do the things that ye would.
There are two natures, principles, forces in each regenerated child of God –
the flesh and the Spirit – they are great enemies that fight and war against each other with different desires.
The Holy Spirit of God operates in conjunction with our spiritual or new man against our flesh or old man, which we received by our first birth as the natural man depraved in sin.
They are entirely opposed to one another, which makes the child of God schizophrenic, with conflicting attitudes, thoughts, words, and actions t
hat he must rule to act like a Christian.
It is not that we can never do good and right things at all, but rather that we can never do good and right things as we would like to do them, because of this internal opposition.
Paul described this internal conflict and inability to always do what is right (
Rom 7:7-25).
Instead of applying we cannot do the things that we would to the flesh restraining the Spirit from good, the context of 5:16 indicates that the Spirit also restrains the flesh from evil!