The belief in the existence of supernatural evil is central to Christianity. Beyond believing in its existence, Christians also believe in evil’s ongoing activity. The Scottish-born and Presbyterian theologian John Murray says that there are “unseen spiritual powers” behind all that is broken in the world. He says, “The arch-foe of the kingdom of God is not the visible powers arrayed against it; for behind these visible agents and manifestations of evil is the ingenuity, craft, malicious design, instigation and relentless activity of the devil and his ministers.” Murray [...]