In John 8 Jesus called his enemies “sons of the devil”. He then describes Satan as a murder from the beginning, a liar, and the father of lies. Although Jesus had much to say about Satan, most professing Christians today do not even believe in the existence of Satan as a real spiritual being with a personality. However, understanding Satan is critical to understanding the condition of the world around us, the cause of suffering, and even the mission of Jesus. In this lesson we explore the nature of Satan, where he came from from, tactics he uses, and how we can defeat him with God’s help.