Twin nature of the believer vs. single nature of the unbeliever

Spirit, soul and body
We are all born spiritually dead
Our spirit is "quickened" or brought alive at the moment we place our faith/trust/belief in the finished work of Christ on the cross, for our sins, Him being God
As a result, saved believers have their souls "sealed with that holy Spirit of promise " (Ephesians 1:13) and we are told to "not grieve the holy Spirit of God, whereby ye are sealed unto the day of redemption" (Ephesians 4:30)
But we have a twin nature; the old man (outward man) and the new man (inward man); we are told to "put off" and "put on"; we are informed of the "law of God" and the "law of sin"; and we are told to "walk in the Spirit" and to not "walk in the flesh"
In descending order of mentions; Romans (13), Colossians (7), Ephesians (6), Galatians (4), 2 Corinthians (3) and Matthew (3), 1 Corinthians (2) and 2 Peter (2), and Mark (1), Luke (1), John (1) and Acts (1)
“O wretched man that I am! who shall deliver me from the body of this death?” (Romans 7:24)
https://dti-tool.disciplers.org/lesson-1-8/c/0/i/22917953/1-8-review-my-two-natures
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