When I am conscious of sin in my own life, I realize that I may one day look back and see that there was something really good or important that I was supposed to be doing, and instead I went my own way and did something else. Sin is not just the committing of a wrong act. Temptation also distracts us from doing things that we should have been doing, the prayers we should have been praying. We’ll never know what would have happened had we done the right thing at that point. I think God must be grieving over our lost possibilities, while by his Spirit, he is giving us the energy we need to make the right decisions.
-- N. T. Wright