The Scripture say the heart is deceitfully wicked who can know it and warns us to crucify our flesh daily; while at the same time tells us we fight against not flesh and blood but against principalities, and powers and rulers of the darkness. Either way only G-d can deliver us and make us more like Him.... So, would you just rather be evil in the heart or oppressed by a demonic spirit? How do you know which is which? (I hope this is the right which, I did not look it up).