>> “Mary has a unique name, a unique title, a unique role in sacred history, and so—though human—is a unique being in the economy of salvation.” <<
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Nonsense in the highest!
Mary had the most common woman’s name, no title whatsoever, was not unique as a person in any way beside her lineage through David, and has absolutely nothing to do with our salvation.
If you really believe a word of what you posted there, there is no hope for you.
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Our Blessed Mother's "Yes" to God echoes throughout all of eternity and salvation history.