It is perhaps one of the most controversial lines in THE SHACK even for those who love the book and the movie. We so associate God with anger, sin, and punishment, that people are asking Wayne and Brad what they meant by that phrase, "Sin is its own punishment." Is that even Biblical since Scripture talks about the punishment of sin? So they guys spend some time unpacking that phrase and its meaning in their own journey and why its important that we see the devastation sin itself causes. Sin's own effects are all the punishment we need either to turn us back to God or to consume us in our self-indulgence. Seeing God as the rescuer in the world rather than the purveyor of punishment will help you understand his nature better. There is nothing God can do to punish our sin that sin itself doesn't already accomplish or that can make the repentant heart more free in his presence?