thisismyusername
*Matt16 18, there reason I am confused is that my understanding of sanctifying grace is that it is the life of the Trinity -the life of God - within the soul. *
That used to confuse me too. But then as I read more about original justice, I found out that Adam and Eve once did possess sanctifying grace, and that they lost that grace in the Fall, along with the preternatural gifts. I also found out that the sanctifying grace of original justice was not the indwelling of the Holy Spirit. So what kind of sanctifying grace did Adam and Eve have? To sanctify means to make holy. Adam and Eve were created pure and holy, without spot or stain (i.e. immaculate). So it is possible for humans to be sanctified without possessing the indwelling of the God.
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Also, you earlier stated that Mary was overshadowed with the Holy Spirit. I read that somewhere that this phrase had some meaning concerning the Holy Spirit taking her as His spouse, or something along those lines*
Here are a few of verses in the scriptures where overshadow is used:
The cherubim shall spread out their wings above, overshadowing the mercy seat with their wings, their faces one to another; toward the mercy seat shall the faces of the cherubim be.
Exodus 25:20
The cloud was seen overshadowing the camp,
and dry land emerging where water had stood before,
an unhindered way out of the Red Sea,
and a grassy plain out of the raging waves,
where those protected by thy hand passed through as one nation,
after gazing on marvelous wonders.
Wisdom 19:7-8
He was still speaking, when lo, a bright cloud overshadowed them, and a voice from the cloud said, “This is my beloved Son, with whom I am well pleased; listen to him.”
Matt:17:5
None of these uses of overshadow suggest becoming pregnant, but all of them involve a theophany of the Holy Spirit, or the Ark of the Covenant.
The Cherubim on the Ark of the Covenant overshadowed the mercy seat with their wings – an image of angels protecting the mercy seat, and protecting what lies within the Ark of the Covenant. The Cherubim have their faces turned towards the mercy seat.
Luke is full typology that makes the Ark of the Covenant a type that finds its antitype in Mary bearing Jesus in her womb. For Luke, Mary with child is the Ark of the New Covenant. I don’t think it is mere coincidence Luke chose the word “overshadow” to when talking about Mary’s conception of Jesus.