It's easy from our perspective 2000 years after the events of Jesus' birth to celebrate the wonder. It's more difficult for us to appreciate the faithfulness of Jesus' earthly parents. Mary was told she would give birth and Joseph told that the baby wasn't his. But both were faithful and pure before the Lord. Their obedience is the background to the story. The baby is the focus, but his earthly parents are the also central to the story. Today, Dr. Biles focuses our attention on Joseph - the earthly father of Jesus.