I am going to focus my comment on our reading from Psalm 7.
David appears to be under some distress. He pleads his case of innocence before God, believing that he has not done anything wrong to receive the ill-treatment of his adversaries.
David knows that God is righteous and will judge over all people for every action: " vs 11).
He also comforts himself with the common wisdom that under God's rule crime does not pay:
Lastly, David praises and gives thanks to the Lord: