When Catholics call Mary the "Blessed Virgin," they mean she remained a virgin throughout her life. When Protestants refer to Mary as "virgin," they mean she was a virgin only until Jesus’ birth. They believe that she and Joseph later had children whom Scripture refers to as "the brethren of the Lord." The disagreement arises over biblical verses that use the terms "brethren," "brother," and "sister." There are about ten instances in the New Testament where "brothers" and "sisters" of the Lord are mentioned (Matt. 12:46; Matt. 13:55; Mark 3:31–34; Mark 6:3; Luke 8:19–20; John 2:12, 7:3, 5, 10; Acts...