David,
I have some difficulties with some of your analysis.
Only mortal sin can remove us from a state of Grace. Performing good works is meritorious and will result in spiritual growth, but works are not necessary as a condition for maintaining our State of Grace. There is no “quota” of good works that we must maintain.
No quota, but they need to be done nonetheless. They are indeed a condition.
Galatians 6:8
8 For the one who sows to his own flesh will from the flesh reap corruption, but the one who sows to the Spirit will from the Spirit reap eternal life.
If you don’t sow, that is do good works, you cannot reap eternal life. Or so says Paul. Or perhaps you think sowing to the spirit does not involve works? I would be eager to hear your analysis, if so.
For myself, sowing to the Spirit is giving assent to the Spirit that works within us to impel us to do the works of God.
Paul He also says we should work out our salvation in fear and trembling (probably because we cannot be sure of what works exactly are necessary to be done.)
Phl 2:12-13 Therefore, my dear friends, as you have always obeyed—not only in my presence, but now much more in my absence—continue to work out your salvation with fear and trembling; for it is God who works in you to will and to act in order to fulfill his good purpose.
The Spirit works in you to will and to do, thus the works you do are an allowing of the spirit to work within you, to sow Him within you.
Lastly,
Trent on Justification (Sixth Session)
CANON XXXII.-
If any one saith, that the good works of one that is justified are in such manner the gifts of God, as that they are not also the good merits of him that is justified; or, **
that the said justified, by the good works which he performs **through the grace of God and the merit of Jesus Christ, whose living member he is,
does not truly merit increase of grace, eternal life, and
the attainment of that eternal life,-if so be, however, that he depart in grace,-and also an increase of glory; ***let him be anathema. ***
Although the merit is a gift, it comes through works (not in return for the works, but the works act as a conduit for grace.)
It is possible that the failure to perform an act of charity could rise to the level of mortal sin (this is called a sin of omission - something we should have done but did not do). I have speculated that such an occasion would be unusual in Western society, and nobody has come up with a plausible example of a hypothetical or actual situation one might commonly find in which a sin of omission could be reasonably considered mortal in nature (whereas examples abound for sins of commission).
Failure to do is failure to sow. Many venial sins of omission can lead to death of one’s faith by moving one toward a state of mind that denies the Holy Spirit to work within one.
peace
steve