Becky
How do we expect the Holy Spirit to come upon Mary without destroying her unless she is first made clean, a worthy receptacle for God to reside in?
Are you "divine" Dave? Does the HS dwell within you?
Again, a clean, sinless human being is not "divine." Do you understand that there is a difference, an unbridgeable gulf between being a created human and being a divine, uncreated god?
That aside, I was made clean upon my Baptism. That is what it is for, for removing sin and for giving the gift of the Holy Spirit. This was allowed because I was born after Jesus came to live on the earth, after He established His Church.
Mary, on the other hand, lived before Jesus came to the earth.
Without the benefit of Christian Baptism, she would have had no way of removing her sin prior to the Holy Ghost overshadowing her. So God cleansed her in a special way, so that she could be a dwelling place for the Lord.
SD