When we speak with God in prayer we do not separate the Son from [God], and when the body of the Son prays it does not separate its head from itself: it is the one Savior of his body, our Lord Jesus Christ, the Son of God, who prays for us and in us and is himself the object of our prayers.
He prays for us as our priest, he prays in us as our head, he is the object of our prayers as our God.
Let us then recognize both our voice in his, and his voice in ours. When something is said, especially in prophecy, about the Lord Jesus Christ that seems to belong to a condition of lowliness unworthy of God, we must not hesitate to ascribe this condition to one who did not hesitate to unite himself with us.....
We pray then to him, through him, in him, and we speak along with him and he along with us.
St. Augustine, commentary on Psalm 85