Commentaries:
One sentence in the Moffatt translation, from verse 15, catches the thought clearly: "And yet one day from the heights of heaven a spirit shall breathe unto us [or, into us]." Then follows the effects of that Spirit. In this context, just as in Psalm 104:30, things begin in a state of destruction and remain that way until God sends forth His Spirit. Then, regeneration of both the people and the land takes place, and the transformation of both occurs.
John W. Ritenbaugh
Pentecost and the Holy Spirit