Becoming a Christian means being transferred from the kingdom of darkness to the kingdom of light. When this happens, Christians also gain a new enemy and adversary: Satan. It’s easy for Christians to err in one of two ways when it comes to the devil. On the one hand, we can focus on him too much, and on the other, we can fail to recognize the power of his influence. In this lecture, Dr. Ferguson describes the nature of our enemy, as well as the resources at our disposal to fight against him.