In this devotional by John Piper, he looks at the 23rd Psalm, and how the writer — King David — switches back and forth between talking about God (“He”) and to God (“You”):
The lesson I have learned from this form is that it is good not to talk very long about God without talking to God.
Every Christian is at least an amateur theologian — that is, a person who tries to understand the character and ways of God and then put that into words….
But what I have learned from David in Psalm 23 and other psalms, is that I should interweave my theology with prayer. I should frequently interrupt my talking about God by talking to God.
Not far behind the theological sentence, “God is generous,” should come the prayerful sentence, “Thank you, God.”
On the heels of, “God is glorious,” should come, “I adore your glory.”
What I have come to see is that this is the way it must be if we are feeling God’s reality in our hearts as well as describing it with our heads.’