Then the angel said to her, “Do not be afraid, Mary, for you have found favor with God.  “And behold, you will conceive in your womb and bring forth a Son, and shall call His name JESUS.  “He will be great, and will be called the Son of the Highest; and the Lord God will give Him the throne of His father David. “And He will reign over the house of Jacob forever, and of His kingdom there will be no end.” Then Mary said to the angel, “How can this be, since I do not know a man?”  And the angel answered and said to her, “The Holy Spirit will come upon you, and the power of the Highest will overshadow you; therefore, also, that Holy One who is to be born will be called the Son of God. (Luk 1:30-35 NKJ)

Overshadowing means to envelop or surround, literally, in this case, to surround with the Spirit’s presence.  The same thought is seen in Luke 4:39 where Jesus ‘overshadowed’ Simon’s mother-in-law and again in Acts 5:14-15 with Peter’s shadow.

Luke 4:37-39  And the report about Him went out into every place in the surrounding region. Now He arose from the synagogue and entered Simon’s house. But Simon’s wife’s mother was sick with a high fever, and they made request of Him concerning her.  So He stood over her and rebuked the fever, and it left her. And immediately she arose and served them.

Acts 5:14-15   14 And believers were increasingly added to the Lord, multitudes of both men and women,  so that they brought the sick out into the streets and laid them on beds and couches, that at least the shadow of Peter passing by might fall on some of them.

This means that the Spirit not only fills the Christian internally but also envelops them on the outside with his presence. So, this morning don’t just clothe yourself physically, but put on your spiritual attire as well. Rom. 9:33; Rom. 10:11; Rom. 13:12, 14; 1 Co. 15:53-54; Gal. 3:27 and Eph. 4:24, 6:11, 14.