If all you want to do is sin, you need to stay in the religion. Since sin is transgression against the Abrahamic god, once you divorce the god you eliminate the ability to sin (you no longer have anything to transgress against). Let's face it, if you want to screw around and do drugs, you can do that anyway. What you're looking for is an excuse to say you lack a moral compass - even more reason to keep the faith, because then you can do all those things and then say "God" will forgive you. That or find some bible verse to cover it; there's plenty to choose from and you wouldn't be the first.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'
