Who says we go to Heaven still sinners?
Luther did with the rather famous “dungheap covered with snow” analogy.
The English Thelogian E.L. Mascall, in trying to explain the influence of nominalism on Reformed theology wrote:
How, then, is somebody whose whole mentality has been cast in the mould of nominalism to conceive the activity of justifying grace? He cannot think of it as consisting in a supernatural transformation of a man’s being in its ontological depths beneath the observable level; for on nominalist principles there is nothing beneath the observable level to transform.
*On the other hand, if justifying grace were to consist of a transformation on the observable level, then man would be simply justified by his works; for on nominalistic principles a man’s observable behaviour is neither more nor less than his total activity. **What, then was there left for Luther to say, being convinced, as he rightly was by St Paul, that a man cannot be justified by his works? Only this: that there is no real change in the man at all, but God treats him as if there was. By a sheer gratuitous act of his love God imputes to the man the merits of Christ; God treats him as if he were as sinless as Christ himself, while leaving him the sinner that he was.” ***
Sanctification is the process of growing in grace. This may not be the best way, but think of it this way:
But here again, if grace is imputed, that is, if all we need for salvation is to be made righteous, why is there a need for us to be sanctified?
One can only speak of sanctification if as Beckwith puts it, grace has “real ontological status, a divine quality that can change nature over time in the soul of the believer who cooperates with God’s free gift of grace.”
But Reformed doctrine says that the “grace” the Christian acquires at his initial conversion (and / or baptism) is just the name the Bible attributes to the legal declaration that we are no longer considered guilty in the eyes of God for our sins because Christ took out punishment on the cross.
For Catholics (if I have this right) justification is ongoing. One is initially justifiied by grace through faith, but the process goes on from there.
The comparison would be that what we call justification is what you call initial justification. For us, we follow justification with sanctification, what you think of as that ongoing process When we say faith alone, we are narrowly referring to initial justification. We view it as monergistic - God’s grace. Sanctification is in many ways synergistic, we are attempting to grow in grace, become more Christ-like, with the help of the Spirit. We do good works, make ourselves available to hear the word and receive the sacrament.
I think the distinction is not so much whether it is on going or not. Rather, for Catholics to be justified is to be made just (not merely declared just) - hence when one is declared just it is also because one is already sanctified. There is no difference.
Here again I note the inconsistency I have stated above. If grace has no capacity to change our nature, what is the nature of this sanctification? If we go to heaven as “dungheaps covered with snow” then why is there a need to be sanctified when, if my understanding is correct, the process actually means we are “made snow”?
If the whole point is salvation, and one is saved once one is forensically justified, why is there a need to be conformed to the image of Christ? Is this an unnecessary extra? Or is this integral to being saved?
I find the phraseology you used here interesting as well: “we are attempting to grow in grace, become more Christlike. “ This to me sounds very much like the Catholic understanding that we need to cooperate with grace. And this becoming Christ like is also very much like theosis or being remade into the image of Christ.
However, I think this contradicts Reformed doctrine of justification.
I have this feeling that Luther was not only in schism with the Church but that his doctrine was in schism with itself.