Notice that if this structure is accepted you have: A: and A/: the peaceful and happy situation of David (which is the result of adhering to C:, D:, and C:/ i.e. the one who submits to the Lord); B: and B/ are the situation of those who refuse to follow the way of righteousness; C:, D:, and C:/ are that which the hearer is exhorted to. So you have an envelope that shows the blessing and joy associated with faithfulness; another envelope showing the actions and consequences of the unfaithful; and a center, tri-partite section showing the need to know, understand and act in accord with God's sacrifice, which, as St. Paul makes clear is Jesus..
A. Answer me when I call, O God of my righteousness! You have given me relief when I was in distress.
Be gracious to me and hear my prayer!
B. O men, how long shall my honor be turned into shame?
How long will you love vain words and seek after lies? Selah
C. But know that the LORD has set apart the godly for himself;
the LORD hears when I call to him.
D. Be angry, and do not sin;
ponder in your own hearts on your beds, and be silent. Selah
C/. Offer right sacrifices,
and put your trust in the LORD.
B./ There are many who say, “Who will show us some good?
Lift up the light of your face upon us, O LORD!”
A.// You have put more joy in my heart than they have when their grain and wine abound.
In peace I will both lie down and sleep; for you alone, O LORD, make me dwell in safety.