dance with the devil

Dance with the devil is an idiom that means you knowingly are doing something that goes against God in one way or another. To dance with the devil also means feeling gleeful about doing something that is against Gods wishes or ideals, such as being a daredevil. Someone who is dancing with the devil is completely aware of what they are doing, they understand it is wrong and they get some kind of joy out of it so they continue to do it.