"Through the centuries the Church has become ever more aware that Mary, "full of grace" through God,[134] was redeemed from the moment of her conception. That is what the dogma of the Immaculate Conception confesses, as Pope Pius IX proclaimed in 1854: The most Blessed Virgin Mary was, from the first moment of her conception, by a singular grace and privilege of almighty God and by virtue of the merits of Jesus Christ, Saviour of the human race, preserved immune from all stain of original sin."
"The Father blessed Mary more than any other created person"
"The Fathers of the Eastern tradition call the Mother of God "the All-Holy" (Panagia), and celebrate her as "free from any stain of sin, as though fashioned by the Holy Spirit and formed as a new creature".[138] By the grace of God Mary remained free of every personal sin her whole life long."
"The deepening of faith in the virginal motherhood led the Church to confess Mary's real and perpetual virginity even in the act of giving birth to the Son of God made man.[154] In fact, Christ's birth "did not diminish his mother's virginal integrity but sanctified it."[155] And so the liturgy of the Church celebrates Mary as Aeiparthenos, the "Ever-virgin".
It was a good read, and I understand the Roman Catholic Theology behind mary, but can you substantiate any of the above points through Biblical texts?
If you want to know about the bible basis of their beliefs read this: http://www.immaculateheart.com/MaryOnLine/html/cover_story_0.html#
After reading it you will see that the bible has absolutely nothing to do with their beliefs in Mary.