Your righteousness, O God, reaches the high heavens.
How often do we view our sin less seriously than God does? Probably all the time. That sounds like an exaggeration, but we really have a very limited and finite understanding of true righteousness - the righteousness of God. His holiness is beyond our comprehension. And, to the extent we do recognize this, we try to minimize our own sin in order to make ourselves appear better than we are. We don't like to admit our sin. Yet it is crucial in order to understand grace.
This ties in to our NT passage as well.
Rayburn says this...
Tomorrow's Bible In a Year Passage passage: Psalms 72-73; Acts 26