It's becoming more obvious to me every day that so many of these incorrect doctrines would vanish in a heartbeat if only those who subscribe to them could understand the proper distinction between justification and sanctification.
For the unjustified, the law functions to illuminate and condemn their sinfulness and to proclaim their need for a savior to be justified. (And also to provide knowledge of right and wrong for all our various relationships in society - justified and unjustified alike.)
For the justified, however, the law sanctifies us and teaches us how to be sanctified. Sanctification necessarily follows justification, but no one is ever sanctified without first having been justified.
We do not and cannot participate in our justification, though we can and do participate in our sanctification. We are justified always and only by grace alone through faith alone in Christ alone, completely apart from any supposed merit or worthiness on our part. Any attempt to add works as a necessary requirement for justification is sinful works-righteousness.
The justified are sanctified by God through their many and varied vocations. While there are certainly activities such as vices and crimes which hinder our sanctification if we participate in them, any activity we do which benefits others is in reality sanctifying for us as God works through our hands and speaks through our voices to provide for others their daily bread - that which is necessary and good in life.
There is no difference in value to God between pious activities like prayer, teaching Sunday school or singing in the church choir and mundane, everyday activities like mending a fence, delivering mail or changing a diaper. God is at work in all these activities expressing his love and providing the needs of people, not merely in the context of the community of believers, but the world over.
Bear in mind that those who are saved - the sheep in the
parable - are not aware of the good works they have done which characterize them as those who have done the will of God. "When did we do these things?" God has done all these things through them because they have been justified - even when they weren't aware of it. God does the work and they get the credit.
Those who are not saved - the goats - are also the hands of God.
God is even hidden in the good works that they do. When they are condemned by the Righteous Judge, hey hold up all the good works they've done and ask him "When did we not do these things?" However, since they are not justified, none of these good works can do anything to obtain for them salvation.