Maybe an example. Where I live, there are a number of folks in our 'downtown core' who are homeless, some (not all) are addicted to Heroin and Fentanyl. Fentanyl is quite lethal and is sometimes used on its own, or is 'cut' into the Heroin unbeknownst to the user. So if a person uses, and overdoses, many on the streets (and others, like myself) have access to what's called "Naloxone". It's injected into the muscle of a person who has overdosed and will temporarily reverse the effects of Opiates. That way, the person who has OD'd can be roused and given medical attention.
All that to say this - if I were to come across someone on the street who had OD'd, and I had my Naloxone kit with me and administered it to the person, is it me that is doing the work to administer the Naloxone? Yes, clearly! Is it out of a right and good motive? Yes, clearly - preservation of life! Is preservation of life motivated by the Grace of God in me? Yes, clearly! WHY? Because, as a Christian, I recognize, admit, and acknowledge that it is the Grace of God in me that birthed the desire to preserve life and act.
Do I get credit, then? No. Credit the Grace of God in me that prompted me to act.
Faith without works is dead (and so is the man on the street)
The issues Josiah raises are formulaic and doctrinaire, and so are not amenable to practical applications such as you suggest and I myself prefer... The formulaic "narrow justification as the Gifts of God etc" is inferred from Scriptural interpretation and then posited, and is not a formulated term or doctrine found in the Bible... When practical issues arise, they are referred to "post narrow justification" issues which are not in view of the beginnings of "narrow justification"...
Christ asked Saul: "Why persecuteth thou Me?"... That means that Proto-Martyr James, whom Paul persecuted unto death, IS Christ in an important and very REAL way... Knowing that Way is knowing God, which IS life eternal... It is progressively attained, from faith to faith, from Glory to Glory, as we obey the Gospel of Repentance, which IS named in the Bible... But all this is swept aside with a posited formula of "narrow justification"... When Justification is the second phase of Salvation - God CALLS, God JUSTIFIES, God GLORIFIES... This is the Salvation of God, and it is being ignored for the sake of a non-Biblical formulaic that insists that the Gifts of God are given which ARE Salvation and THEN we do their works, when the work of repentance is the life-long labor of all Christians in the response of obedience to the Gospel command "Be ye repenting" (unto the end)...
Repenting, you see, is the proper response to the CALL of God in the Gospel of Jesus Christ...
And Paul instructs us to persevere to the end...
The LABOR of repentance comes to a point wherein God Justifies the penitent...
And then the labors are enhanced within the Kingdom of Heaven on earth...
And when the Giants are overcome (David beheading Goliath) we are Glorified by God on earth...
Such that the shadow of Peter brings healing to the sick...
So I do not see a way to engage Josiah in this complaint he has with the Latin Church...
Approaching the issue of the means of Salvation seems ruled out...
He but seems to be insisting that an anathema be justified in view of this formulaic...
Arsenios