I honestly do not see repetition here so much as progressive thought and realization of his own condition in light of the law
My personal approach, is to appreciate the depth and the almost painful realization in this man's soul of God's holiness and his incapability to complete the requirements to look God full in the face and say 'I am worthy'. we are never worthy in keeping what cannot be kept. we are only worthy in Christ
the appeal for 'salvation' in the Psalm, is to God's character, not his own character
My personal approach, is to appreciate the depth and the almost painful realization in this man's soul of God's holiness and his incapability to complete the requirements to look God full in the face and say 'I am worthy'. we are never worthy in keeping what cannot be kept. we are only worthy in Christ
the appeal for 'salvation' in the Psalm, is to God's character, not his own character
I can't see a progression
how about making an outline or summary of each section so I can see what you're seeing?
my summary is
the psalmist has ups and downs
the psalmist loves God's law