A man gives another a piece of bread or a piece of money. He gives it away and has nothing further to do with it. It is not so with God's gift of the Holy Spirit. No, the spirit is God. God is in the Spirit who comes to us, even as he was in the Son. The gift of the Spirit is the most personal act of the Godhead. It is the gift of Himself to us.
Taken from the book Experiencing the Holy Spirit by Andrew Murray 1828-1917