For if they that are of the law be heirs, the faith is made powerless, and the promise is unmeaning;

While we were still helpless [powerless to provide for our salvation], at the right time Christ died [as a substitute] for the ungodly.

Of this taking note - that, our old man, was crucified together with him in order that the sinful body might be made powerless, that we should, no longer, be in servitude to sin;

For what was impossible to the Law--powerless as it was because it acted through frail humanity--God effected. Sending His own Son in a body like that of sinful human nature and as a sacrifice for sin, He pronounced sentence upon sin in human nature;

That is why the mind that focuses on human nature is hostile toward God. It refuses to submit to the authority of God's Law because it is powerless to do so.