St Paul uses the term “regeneration” once, in Titus 3:5, through Baptism. The context, Titus 3:4-7, shows it is clearly an infusion of grace leading directly to justification (v7).
Justification is a forensic concept by which we are declared or viewed as righteous. We are not actually made righteous because we still have the old sinful nature within us with which we must fight for the rest of our lives.
This is only partly true, though your comments are built on unBiblical concepts. The Bible does not teach God considers something righteous that is not internally, in fact it condemns such a notion (cf Mat 23:25-27). We ARE made righteous through the infusion of grace, the indwelling of the Holy Spirit makes us righteous by DEFINITION. Note how places like 1 Cor 6:11 put “sanctification” BEFORE “justification”.
While you are right we still struggle against sin, that is due to concupiscience which is a effect of the fall. It is not sin itself but rather the “urge” to sin, which is not a sin either. Yes that effect remains but through God infusing grace into our souls, our souls become actually righteous that moment and God recognizes this.
Sanctification is the process by which we work to become righteous and more like Jesus. It is never finished in this life and we don’t merit salvation because of it.
As above, you are partly right, but still miss a key understanding as I noted above.
As for growing in righteousness (sanctification) you are right we are to spend our life growing like this, but that in no way means the sanctifying grace already in our souls doesnt make us righteous, it does.
We already owe God all the good works we could possibly do, but doing them is the evidence that we have been regenerated and justified.
Again, partly correct, partly incorrect. Yes we can only do good works (including have faith) by God’s enabling and sanctifying grace, but these works are not guaranteed. The letters to the Galatians and Corinthians are explicit proof of Christians turning to lives of sin.
Finally there is glorification when we finally become fully righteous in Heaven.
A person who believes in “once saved always saved” believes that we cannot lose our justification. Not all Protestants believe this and I personally do not believe it.
The OSAS concept originated from Calvin, and it was in fact the logical conclusion to a forensic justification through imputed grace (as opposed to infused grace).
We must continue to have faith throughout our lives to retain justification.
Then you cant break justification and sanctification in two parts for clearly if you turn to a life of sin you lose justification and thus it cant be the forensic and imputed concept you propose.
If you are declared righteous though in fact you are not (imputation), then not being righteous in the future has no bearing on your justification either. In a trial you can only be put on trial for a specific crime once, in the classical protestant understanding though you are charged with being unrighteous through imputation you are declared innocent and righteous and cannot ever be charged as being unrighteous again.
Even for the “once saved always saved” school Genesis 12 does not present a problem. While justification is a one time final event, once it takes place the justified status remains. At any subsequent time it can be said that we are justified and that our faith continues to be accounted as righteousness. Therefore, while Abraham was justified by faith in Genesis 12, it can still be said that his faith was reckoned to him as justification in Genesis 15. Paul quotes Genesis 15 because this is where the statement is actually made in the Old Testament. The same reasoning applies to Hebrews 11. Abraham had faith and was justified when he left for Canaan and continued to be righteous through faith when the promise was made in Genesis 15.
If you don’t believe in “once saved always saved”, then justification is an ongoing declaration that we are righteous. If you lose your faith you are no longer regarded as righteous. If you regain your faith you are again being justified through your faith. Neither Genesis 12 or Hebrews 11 causes us any problem.
You dont seem to understand classical Protestant concept of justification. It occurs once, through imputation, after regeneration. To say it occurred later as well in Gen 15 means your definition is incorrect/impossible.