I know how that is. Of course, everyone has some darkness in them, their sin nature (which is so fun, especially the carnal sins).. but those like us, there's actual darkness. It's worse. Sort of like keeping a monster in a cage, isn't it?
But what if... you could use your dark power for another purpose. For a righteous cause. Using it for good, to help people. Such as, fighting evil or killing monsters. It usually worked for me. I even used it to help fight an apocalypse and send Lucifer back in his cage.