How was Mary conceived without sin?

My younger brother left the church several years ago. He traded his Catholic faith for an evangelical belief. As a consequence his belief is based on scripture. In a recent conversation about Mary, his contention was that the scriptures point out in the gospels, Mary’s lineage to Adam, and since sin entered the world through one man Adam and Mary’s confession of her God being her Savior in the gospels (uncertain what verse he references), that the scriptures have no witness of Mary being born without sin.

I would really appreciate your help in responding. I am more than willing to do the work to improve my own understanding.

Mike

These links should give you the answers that you need. If you have any further questions or concerns that are not answered by this, please contact Catholic Answers directly.
**Recommended Reading:
**
[LIST]
*]Immaculate Conception and Assumption
]Mary: Ever Virgin (Fathers)
]Mary: Full of Grace (Fathers)
]Mary: Mother of God (Fathers)
*]The Rosary
]The Intercession of the Saints (Fathers)
*]Praying to the Saints
*]Saint Worship?
*]‘Brethren of the Lord’
*]: Part I (This Rock: August 1992)CRI’s**Mary
*]: Part II (This Rock: September 1992)CRI’s**Mary
*]: Part III (This Rock: October 1992)CRI’s**Mary
*]: Part IV (This Rock: November 1992)CRI’s**Mary
*]: Part V (This Rock: December 1992)CRI’s**Mary
*]: Part VI (This Rock: January 1993)CRI’s**Mary
*]: Part VII (This Rock: February 1993)CRI’s**Mary
[/LIST]

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