Some will have this given as a reason why Elisabeth pronounced her blessed, because she believed that what God had said should have its effect; as, Luke 11:27,28, when the woman blessed the womb that bare Christ, and the paps that gave him suck, Christ saith, Yea, rather, blessed are they that hear the word of God, and keep it. Mary was blessed not in this so much, that she brought forth Christ, as in this, that she believed in him. The words are certainly a great confirmation of what the angel had before told her, and it must needs be a great satisfaction to her to hear to her kinswoman, by the Spirit of prophecy, coming extraordinarily upon her, confirming what the angel had before told her.
Related Commentaries of Luke 1:45
Luke 1:45
45 And blessed is she that believed: for there shall be a performance of those things which were told her from the Lord.