Our apartment windows need to be cleaned badly. But it's one thing to see the negative--grime needing to be removed--thus clean them, and another thing to anticipate positives--how clear they will be and readily admit light as well as how fresh I will feel--thus clean them.
If you want another parallel here, it would be motivations of Legalistic Christianity--removing offensive behavior and habits, even standards--as opposed to motivations of Grace--desiring an unimpeded, intimate love-relationship with God, when resolving sin. They're both seemingly doing the same thing.
