Fellowship with God, is opening the heart to God. To be able to talk to the Lord of lords, is part of the Grace of God. Prayer as Submission. To submit we must use our will, and by doing so, we become more like Jesus. Prayer as Petition.
Petitioual prayer needs communion and submission.
It comes out of a heart-fellowship with God. And should be in line with God's will for the World and us. It is an act of faith. Prayer as Co-operation. It is both a motive and glory of prayer.