In God my Saviour - God is called “Saviour,” as he saves people from sin and death. He was “Mary’s” Saviour, as he had redeemed her soul and given her a title to eternal life; and she rejoiced for that, and especially for his mercy in honoring her by her being made the mother of the Messiah.
Related Commentaries of Luke 1:47
Luke 1:47
47 And my spirit hath rejoiced in God my Saviour.