The New John Gill Exposition of the Entire BibleLuke 1:37
For with God nothing shall be impossible.
] That is
consistent with his nature and perfections, with his counsels,
purposes, and promises: every thing that he has said, purposed, or
promised, he is able to do, and will; every word that he has spoken,
every thing predicted by his prophets, or declared by his angels,
and particularly this of a virgin's conceiving and bearing a Son: so
that the angel not only answers her question, how this should be,
but confirms her faith in it; partly by the instance of her cousin
Elisabeth, and partly by observing the infinite omnipotence of God.