God had a plan.  He is going to put his Spirit back into man.  But first, He waits.  I have no reason why.  That's one of the questions I'm going to ask Jesus when we all get to heaven.  Why did God wait?  I know that "God's time" is something that I don't understand, but I also know that he has perfect timing.  I've experienced it.

Mark tells us in Mark 4:3b-6 "...we, when we were children, were in bondage under the elements of the world (sin);  But when the fulness of the time was come,  (God's time) God sent forth his Son, made of a woman, made under the law, To redeem them that were under the law that we might receive the adoption of sons.  And because you are sons, God has sent forth the Spirit of this Son into your hearts, crying, Abba, Father.   The Spirit in our hearts.  We are finally whole again.  Like God created Adam in the first place.

We have been redeemed.  Bought back.  God still wanted us to be his sons and daughters.  He wanted to put His Spirit back inside us where it belonged.  

Paul puts it this way in Colossians 1:23b, 26-27 "...and be not moved away from the hope of the gospel, which you have heard, and which was preached to every creature which is under heaven;...To whom God would make known what is the riches of the glory of this mystery among the Gentiles; which is Christ in you, the hope of glory;"

I love a good mystery.  I love the way Paul puts words together.  Christ in you the hope of gory.  And it was preached to every creature under the heaven.  The heavens declared the glory of God and the skies showed his handiwork.  In every language.