"So the Archangel Gabriel, who visited Mary, greeted her with great courtesy, and then said, 'Fear not!" And then he told her that she was going to have a baby, a remarkable baby who would be called the Son of the Highest...
What an amazing, what an impossible message the angel brought to a young girl! But Mary looked at the angel and said, 'Be it unto me according to your word.'
And so the life of Jesus began as it would end, with the impossible. When he was a grown man he would say to his disciples, "For human beings it is impossible. For God nothing is impossible.'"
(Madeleine L'Engle, The Glorious Impossible)