Then Philip went down to the city of Samaria and preached Christ to them. And the multitudes with one accord heeded the things spoken by Philip, hearing and seeing the miracles which he did. For unclean spirits, crying with a loud voice, came out of many who were possessed; and many who were paralyzed and lame were healed. And there was great joy in that city.
But there was a certain man called Simon, who previously practiced sorcery in the city and astonished the people of Samaria, claiming that he was someone great, to whom they all gave heed, from the least to the greatest, saying, "This man is the great power of God." And they heeded him because he had astonished them with his sorceries for a long time. But when they believed Philip as he preached the things concerning the kingdom of God and the name of Jesus Christ, both men and women were baptized. (Acts 8:5-12)
Are demonism and sorcery as much a problem today as they were in the first century? What differentiates the indwelling of the Holy Spirit from demon possession? Does God work out His purposes through demons?