We've entered into this discussion before, and I don't want to try to parse out this or that, and since our previous conversation I've given a lot of thought to this particular question.
I believe the unredeemed, with only the body and life of the flesh, get up in the morning thinking about what evil they will do, and spend their day pursuing it.
I believe there are many reasons why people do what they do, and that the corruption of the flesh is a very real factor that is true of our physical bodies. {
@Not me } When I look at "sarx" (Greek - flesh) at it's usage in the Bible, I see consistently in those passages which show by context the specific meaning of the word, it seems to me invariably it's refering to the body, even sometimes meat, or to that which pertains to our physicality, such as ancestry, like, we have "fathers of our flesh", and our Heavenly Father.
I see specific corruption in my flesh which as it's pathology works to make my mind and behavior certain ways. Even digestive flora imbalances can modify mood, creating depression, anxiety, take anxiety . . . another name for Fear. Anxiety exists as a physical condition. Depression exists as a physical depression.
Anxiety produces the feelings of fear, and the feelings of fear tend to stir up genuine fears. Depression in the same way can stir up a lack of trust, of the feelings of faith.
Walking in the Spirit takes one away from the evil affects of those things. Sometimes God has removed those things from me, other times He has allowed them to complete their perfect work.
We can joy in the love of Jesus while in agonies of all sorts.
I believe the body is corrupted, that is, damaged. I believe the damaged, corrupted body and especially brain produce an equally corrupted mind (of the flesh). I think this body may be healed by God or may not be, depending on what best serves His purposes in our lives.
I believe God is clear in His teaching that our flesh is crucified, and we crucified unto it. We have no need, reason, obligation, or necessity to allow the mind of the flesh to direct the works of the flesh.
We who love God wake up in the morning and want God. We want to do what pleases Him in all things.
With that being said . . . sin comes when we are enticed, and we traipse off into sin. And it can look like a lot of things, it can be brewing in the mind for days, but what we're really seeing is not planning sin for days, then committing it, but the sin begins days before in the mind, and then continues to grow to completion.
We can interrupt that process at any time by asserting our faith in Christ. And also by doing something else. Stop letting that brain serve evil, make it serve righteousness. Stop letting our hands serve evil . . . serving the flesh.
God allows contrary circumstances to test us (1 Cor 10). If we respond in faith, righteous acts result. But we can forget His promises, and feel that we have no power, of that this is what we have to do, or whatever that deceptive lust of the flesh is saying to us.
But if we remember that we've been cleansed of our sins that are past, we know we are free to not sin, that cleansing is a complete removal of sin. No need to return, remember who we are.
And if we forget, if we end up sinning, Jesus always will intercede on our behalf. He stands up for His brothers and sisters. After all, we're not the guilty party.
OK . . . I've written a long time, now I feel I'm rambling. I'll leave the reader to let me know if I've been completely confusing!
:)
Much love!