I don't see that in scripture about having another nature. That's to be reckoned dead isn't it? And its our mind that needs renewed to truth.
"For we know that the law is spiritual, but I am carnal, sold under sin. For what I am doing, I do not understand. For what I will to do, that I do not practice; but what I hate, that I do. If, then, I do what I will not to do, I agree with the law that it is good. But now, it is no longer I who do it, but sin that dwells in me. For I know that in me (that is, in my flesh) nothing good dwells; for to will is present with me, but how to perform what is good I do not find. For the good that I will to do, I do not do; but the evil I will not to do, that I practice. Now if I do what I will not to do, it is no longer I who do it, but sin that dwells in me.
I find then a law, that evil is present with me, the one who wills to do good. For I delight in the law of God according to the inward man. But I see another law in my members, warring against the law of my mind, and bringing me into captivity to the law of sin which is in my members. O wretched man that I am! Who will deliver me from this body of death? I thank God—through Jesus Christ our Lord! So then, with the mind I myself serve the law of God, but with the flesh the law of sin. (
Romans 7:14-25)
The NIV refers to this as the "sinful nature". Yes that is to be reckoned dead. However, the life given to us by Christ makes us aware that our flesh still wars with the Spirit. If this were not true then why would we continue to confess our sins to one another (
James 5:16) after we are saved. The battle with temptation is won or lost based upon how fully we are surrendered to the control of the Holy Spirit (
Galatians 5:16-17). The Holy Spirit, will disciplined and convicted us if we begin to go astray. So what in us causes us to do what we don't want to do?
We (none of us, Jew included) was ever Spirit until Jesus rose again and we believe. Now we are Spiritual beings and produce fruit and works of the Spirit. Not flesh. Agree or not?
Agree - we are to produce fruit and do the work of the Spirit in accordance with God's good and perfect will, which will be different for each of us.
Not certain what you mean by "was ever Spirit" the same Holy Spirit that was in the Old Testament is the same Holy Spirit that is the new, the only difference is that:
The Spirit “came upon” Old Testament people such as Joshua (
Numbers 27:18), Samson (
Judges 14:6), Saul (
1 Samuel 10:10), and David (
1 Samuel 16:12-13). Moreover, the Spirit would not always remain with these individuals, but came upon them to perform certain tasks. Even David cried out to God not to take back His Holy Spirit (
Psalms 51:11). Whereas, in the New Testament we are taught that the believer receives the permanent indwelling of the Holy Spirit (
1 Corinthians 3:16-17; 16:19-20). Paul refers to this as the seal or permanent dwelling of the Holy Spirit, which guarantees our inheritance (
Ephesians 1:13-14).
I had that picture of an umbililical cord from my belly to the heavens a long time ago, so I agree with your words infusion of blood. But, the sin nature? Temptation from thoughts? We aren't perfect until the final step that's true, but temptations are less in power as we grow in grace. Again, agree or not?
Agree - We will growing stronger in Christ by the washing of His word (
Ephesian 5:26). Draw near to God and He will draw near to you (
James 4:8); and where sin abounded, grace abounded much more (
Romans 5:20).