Originally Posted by Traditio
This simply betrays an ignorance in what is meant by "nature." When I say "nature" I mean something like "man" or "humanity." What you and I have in common is that we are both men. God apparently can't intend to abolish nature, since God is the very author of nature. Without esse (the act of being) freely being granted by God to this or that nature, the nature is nothing. Unless God makes a horse to be, the horse is nothing.
Nature is, in a sense, a cause or principle of substance in the secondary order(s) of causality suspended upon God as the First Cause.
If God abolishes nature, then He abolishes the substance with it. If he abolishes my humanity, then He abolishes me with it. I am a man. It is the same as if He were to abolish my esse (my act of being). Without esse (the act of being), I am nothing.
In any case, as a proof from revealed faith: God clearly doesn't intend to abolish nature. Evidence for this is the resurrection of Christ and His glorified human nature post-resurrection.
This specifically refers to the law of the fomes of sin. The old man is human nature as fallen/subject to the law of the fomes of sin. This indeed will be destroyed, since, in Heaven (if we are lucky enough to get there), we won't be subject to that law of death which is "fighting against the law of my mind" (Romans 7:23).
This doesn't refer to human nature as such. Again, proof of this is the resurrection of Our Lord Jesus Christ.
You don't understand that your humanity has been put to death in Christ. Paul said, "I have been crucified with Christ,"
"For as in Adam all die, even so in Christ shall all be made alive," 1 Corinthians 15:22.
We have died and have been resurrected in Christ,
"Therefore if any man be "In Christ" He is a new creation: old things have passed away; behold all things are become new," 2 Corinthians 5:17.
This is very spiritual. Our righteousness is in heaven at the right hand of God, Colossians 3:3.