The angel replied, “The Holy Spirit will come upon you, and the power of the Most High will overshadow you. So the Holy One to be born will be called the Son of God.
35. The Holy Ghost shall come upon thee The angel does not explain the manner, so as to satisfy curiosity, which there was no necessity for doing. He only leads the virgin to contemplate the power of the Holy Spirit, and to surrender herself silently and calmly to his guidance.
We have here notice given us of all that it was fit we should know concerning the incarnation and conception of our blessed Saviour, six months after the conception of John. The same angel, Gabriel, that was employed in making known to Zacharias God's purpose concerning his son, is employed in this also; for in this, the same glorious work of redemption, which was begun in that, is carried on.
Commenting on Luke 1:26-38
And the angel answered and said unto her,.... The angel gave her an account of the manner in which what he had said should be effected, as well as observed some things for the strengthening of her faith, The Holy Ghost shall come upon thee.