Repentance is a turning away from sin and toward God. It is the realization that our way is lacking and His is perfect. The author of Psalm 19 is saying that both creation and the law preach God in different ways and intend on leading us toward himself.
Who is this King of glory?
Life is a see-saw of constant conversion. Believers naturally desire obedience because of the Holy Spirit within their hears. But how do we keep on track when messy human-ness gets in the way?