What if evil doesn't really exist? What if evil is something dreamed up by man, and there is nothing to struggle against except our own limitations? The constant battle between our will, our desires, and our choices?
We all do things we desperately wish we could undo. Those regrets just become part of who we are, along with everything else. To spend time trying to change that, well, it's like chasing clouds.
Because you don't notice the light without a bit of shadow. Everything has both dark and light. You have to play with it till you get it exactly right.