Joseph also went up from Galilee, out of the city of Nazareth, into Judea, to the city of David, which is called Bethlehem, because he was of the house and family of David;
And so he is telling Mary, "Look, this child is set for great blessings to the people, but it's going to pierce as a sword through your own soul." Preparing her for the agony and the pain that she would experience, as she would watch one day this child, hanging on the cross.