Jamieson, Fausset and Brown on Luke 1:42-44

42-44. What beautiful superiority to envy have we here! High as was the distinction conferred upon herself, Elisabeth loses sight of it altogether, in presence of one more honored still; upon whom, with her unborn Babe, in an ecstasy of inspiration, she pronounces a benediction, feeling it to be a wonder unaccountable that "the mother of her Lord should come to her." "Turn this as we will, we shall never be able to see the propriety of calling an unborn child "Lord," but by supposing Elisabeth, like the prophets of old, enlightened to perceive the Messiah's Divine nature" [Olshausen].