He has shown strength with his arm; he has scattered the proud in the thoughts of their hearts;
51. He hath done might This means, “he hath wrought powerfully.” The arm of God is contrasted with every other aid: as in Isaiah, “I looked, and there was none to help,” (Isaiah 63:5;) “therefore,” says he elsewhere, “his arm brought salvation unto him; and his righteousness, it sustained him,” (Isaiah 59:16.) Mary therefore means: God rested satisfied with his own power, employed no companions...
We have here an interview between the two happy mothers, Elisabeth and Mary: the angel, by intimating to Mary the favour bestowed on her cousin Elisabeth (Luk 1:36), gave occasion for it; and sometimes it may prove a better piece of service that we think to bring good people together, to compare notes. Here is, I. The visit which Mary made to Elisabeth.
Commenting on Luke 1:39-56
He hath showed strength with his arm,.... Of almighty power, in the business of the incarnation, and in working out salvation for his people; which is done by his own arm, he being mighty to save, and travelling in the greatness of his strength; see Isa 63:1.