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.

My spirit hath rejoiced - Exulted. These words are uncommonly emphatical - they show that Mary's whole soul was filled with the Divine influence, and wrapped up in God.

And my spirit hath rejoiced in God my Saviour. Which also, may be understood, either of God the Father, who was her Saviour, both as the God of nature and providence; so the Persic version renders it, "in God that gives me life"; and who had supported, maintained, and preserved her life; and as the God of grace, who has contrived the scheme of salvation, fixed upon, and appointed Christ to be the Saviour; and who saves by him, and therefore is sometimes said to be our Saviour. Titus 3:4 or of Christ, the Son of God, who being truly and properly God, was fit to be a Saviour; and is a very suitable, able, and willing one; and which is the great encouragement to sensible sinners, to look up to him, and be saved; and lays a solid foundation for rejoicing in him, since what he did as man, had hereby an infinite virtue and efficacy put into it, as was put into his blood, sacrifice, and righteousness; whereby the purposes designed were answered by them; and since he must be able to keep their immortal souls, which they commit unto him, and must have an interest with his Father, as their advocate, and a fulness, to supply all their wants: the consideration of Christ, by Mary, as God her Saviour, as having an interest in him, as a Saviour, and this her Saviour, God, gave her greater joy, than being the mother of him as man; and this her joy was not carnal, nor merely external, but inward and spiritual: it was a joy in her own spirit, and was excited there by the holy Spirit of God.

God my Saviour (τῷ θεῷ τῷ σωτῆρί μου)

Note the two articles. "The God who is the or my Saviour." The title Saviour is often applied to God in the Old Testament. See Septuagint, Deuteronomy 32:15; Psalm 24:5; Psalm 25:5; Psalm 95:1.

And my spirit hath rejoiced in God my Saviour.

1:47 My Saviour. Mary, by this word, reckons herself among that which was lost. She obtained salvation, not from herself, but from Jesus. (Bengel).

1:47 My spirit hath rejoiced in God my Saviour - She seems to turn her thoughts here to Christ himself, who was to be born of her, as the angel had told her, he should be the Son of the Highest, whose name should be Jesus, the Saviour. And she rejoiced in hope of salvation through faith in him, which is a blessing common to all true believers, more than in being his mother after the flesh, which was an honour peculiar to her. And certainly she had the same reason to rejoice in God her Saviour hat we have: because he had regarded the low estate of his handmaid, in like manner as he regarded our low estate; and vouchsafed to come and save her and us, when we were reduced to the lowest estate of sin and misery.

Margin Saviour

See Scofield Note: "Rom 1:16"

47. my Saviour-Mary, poor heart, never dreamt, we see, of her own "immaculate conception"-in the offensive language of the Romanists-any more than of her own immaculate life.

1:39-56 It is very good for those who have the work of grace begun in their souls, to communicate one to another. On Mary's arrival, Elisabeth was conscious of the approach of her who was to be the mother of the great Redeemer. At the same time she was filled with the Holy Ghost, and under his influence declared that Mary and her expected child were most blessed and happy, as peculiarly honoured of and dear to the Most High God. Mary, animated by Elisabeth's address, and being also under the influence of the Holy Ghost, broke out into joy, admiration, and gratitude. She knew herself to be a sinner who needed a Saviour, and that she could no otherwise rejoice in God than as interested in his salvation through the promised Messiah. Those who see their need of Christ, and are desirous of righteousness and life in him, he fills with good things, with the best things; and they are abundantly satisfied with the blessings he gives. He will satisfy the desires of the poor in spirit who long for spiritual blessings, while the self-sufficient shall be sent empty away.