George T. Montague in his book ‘Mary’s Life in the Spirit’ writes ‘God’s Faithfulness to His Promises. And that is what she said in the concluding line: ‘He has helped Israel, his servant, remembering his mercy (as he promised our fathers) to Abraham and his descendants forever.’ (Luke 1:54-55) God’s love for his people Israel, shown in the past and now brought to a climax in the sending of the Savior, means that he has remembered Abraham…When God remembered, he does more; he moves to save. So God’s remembered Noah floating on the flood waters and sent a wind to dry them up. (Genesis 8:1) God ‘remembered’ Abraham and saved his nephew Lot (19:29) God ‘remembered’ Rachel and enabled her to conceive (30:22) He ‘remembered’ his covenant with Abraham and sent Moses to lead his people to freedom. (Exodus 2:24) So God has now remembered his mercy and his loving kindness ti Abraham and has sent his offspring, Jesus to save his people.’
‘To-non-Jews-and that is most of us-it may sound off that sending Jesus is God;s remembering an ancestor lost in the midst of remote time. But the Jews had a keen sense of God’s fidelity, his faithfulness to his promise. Jesus is not just a savior suddenly sent to rescue a world gone amok; he is the fulfillment of a promise. This is a major theme of Paul’s Letter to the Romans. God has fulfilled his promise-has shone himself righteous to his covenant promise-by sending Jesus.
‘Thus, Mary’s mention of Abraham at the finale of her song is significant. She see her blessing not just in cosmic hues for the future; she see it a climaxing a love story that had begun thousands of years earlier when God chose Abraham and made him the father of nations. (Genesis 17;4-6) Moreover, God blessed Abraham because of his faith in God’s incredible promise. (15:6) Mary, too, unlike Zechariah but in perfect sync with Father Abraham, is blessed for her faith in an even more incredible promise. (Luke 1:45)