Defiantly the Yin (upper half) and the Yang (lower half)

It's good to read the Bible, but most people just get the wrong messages like those "friends" he had. There are two ways to read the bible: Face value and Inside message. These people don't see the true message in those passages. It said "Sorcery is evil" because Back then, witches would perform blood pact spells or kill animals and use their blood to inflict curses upon their victims to gain slaves. Nowadays, Magic is known as a Self defense tool, like what Crocko did. I'm sure with enough training, he'll master his powers. God freed him from the demon but let him keep his magic for a reason.