Tim Challies leaves out a crucial piece of Reformed Protestantism when he describes The Utter Devastation of Sin:
But is even a tornado a significant enough picture of sin? A tornado is one big system that devastates and destroys, but quickly moves on. As much damage as that F4 tornado did to Ringgold, it lasted for just a few minutes and was gone. Sin is different in that a big sin seems to spawn a thousand little sins. So maybe we need to push the metaphor to near the breaking point to say that sin is like a big tornado that tears through town while spawning off hundreds of smaller tornados, each of which goes in its own direction, causes its own trauma, and leaves behind its own trail of destruction. One big sin is so awful, so evil, so sinful, that it generates a thousand little opportunities to compound the sin, setting off all those other whirlwinds. People can sin in their response—perhaps they try to cover it up or they try to downplay it. People can sin as they process it—perhaps they gossip about the people involved or they make prideful assertions. People can sin in their actions—perhaps they over-react or under-react, displaying either needless panic or thoughtless apathy. The possibilities are endless.
The fact is that sin is awful, unbearably awful. Sin is evil, horrifyingly evil. And sin begets sin. There are endless ways that sin invites sin, that sin promotes further sin, that sin invites the opportunity to sin more, to sin deeper, to spawn off into a massive all-consuming storm. Let this be just one more reason to put sin to death—to search it out, pray it out, and, through the power of the Holy Spirit, to root it out.
O, wretched man that he is, to borrow a phrase. Wasn’t this understanding of the pervasiveness of sin what drove Luther to the alien righteousness of Christ imputed by faith alone as his only hope? And wasn’t the pervasiveness of sin in his regenerate self what drove Paul to the freedom from the law that he found only in Christ? So why bring up the Holy Spirit and the quest for holiness apart from Christ?
So I find it to be a law that when I want to do right, evil lies close at hand. For I delight in the law of God, in my inner being, but I see in my members another law waging war against the law of my mind and making me captive to the law of sin that dwells in my members. Wretched man that I am! Who will deliver me from this body of death? Thanks be to God through Jesus Christ our Lord! So then, I myself serve the law of God with my mind, but with my flesh I serve the law of sin.
There is therefore now no condemnation for those who are in Christ Jesus. For the law of the Spirit of life has set you free in Christ Jesus from the law of sin and death. For God has done what the law, weakened by the flesh, could not do. By sending his own Son in the likeness of sinful flesh and for sin, he condemned sin in the flesh, in order that the righteous requirement of the law might be fulfilled in us, who walk not according to the flesh but according to the Spirit. (Romans 7:21-8:4 ESV)
Without Christ, doesn’t putting sin to death place you on the same treadmill as your average Roman Catholic (not really given the soteriological security we see at Old Life from the ex-Protestant Roman Catholics)?
Faith in Christ doesn’t give us a clean slate to be holy now that past sins are forgiven. The active obedience of Christ is also imputed to us in faith. It lets us looking indwelling sin in the eye before turning to look in trust at Christ. Shouldn’t someone who identifies with Calvinism (even of a recent sort) know better?