Blessed Virgin Mary: The Doctrine of the Immaculate Conception

Blessed Virgin Mary: The Doctrine of the Immaculate Conception
Another strong wording from allaboutreligion.org:

The doctrine of the Immaculate Conception teaches that the Blessed Virgin Mary was born without original sin. She was a virgin when she conceived Christ, impregnated through the power of the Holy Spirit. In 1854, four years before the apparitions of Mary at Lourdes, Pope Pius IX defined the Dogma of the Immaculate Conception which stated that "the most Blessed Virgin Mary, in the first instant of her conception, by a singular grace and privilege granted by Almighty God, in view of the merits of Jesus Christ, the Savior of the human race, was preserved free from all stain of Original Sin." The Bible teaches that only Jesus Christ, the last Adam, was born without original sin, and all other men and women are born into original sin, inherited from Adam (Romans 5:12).

Furthermore, the Roman Catholic Church teaches that Mary was a virgin during her entire lifetime. Yet Matthew, a Jew writing to Jews, calls Jesus "her firstborn son" (Matthew 1:25), an expression used by Jews only if other children were born after the first one; otherwise, "only son" would have been used. Scholars believe Matthew wrote his gospel about 35 years after the birth of Christ and he evidently knew that Mary had children after Jesus was born. The Bible specifically says that Jesus had brothers and Matthew even tells us their names: "Isn't Mary known to be his mother, and James, Joseph, Simon, and Judas his brothers? Aren't his sisters our neighbors?" (Matthew 13:55-56). Roman Catholic scholars claim that Matthew, Luke and Paul (1 Corinthians 9:5) didn't mean brother when they said brother, but meant cousin. This view is based on the Greek word "adelphos," which can be translated "brother" or "cousin." However, the Jews compared Jesus to His ordinary brothers in an attempt to question the validity of His ministry; it would have been much less compelling to compare Jesus with His cousins.