If our sin is mere failure to conform-simply a mistake to do what is right---forgiveness is really the granting of an opportunity to try again. In that light, it is like forgetting to finish one's homework.
We deserve a low grace, and grace becomes merely the privilege of doing it over to get a higher mark. Such a view of grace might generate appreciation, but it would never drive us to worship. If, in fact, sin is not only failure to hit the mark of God's perfection, but also a deep, insidious energy that desires to eradicate from our existence an affronting God who demands perfection, then forgiveness becomes breathtaking, incredible, and wonderfully insulting.
Dan Allender, in the book Bold Love