He will be great, and will be called the Son of the Most High. The Lord God will give him the throne of his father, David,

 Mary was betrothed to Joseph. Betrothal lasted for a year and was quite as binding as marriage. It could be dissolved only by divorce. Should the man to whom a girl was betrothed die, in the eyes of the law she was a widow. In the law there occurs the strange-sounding phrase, "a virgin who is a widow." 