Why did God permit demon possession to occur during the time of Christ? Does demon possession occur today? How to test claims of casting out of demons? Passages mentioned include: 1 Thessalonians 5:19-21, Revelation 2:1-2, Job 1:6, 2:1, Genesis 6:1-4, 2 Peter 2:4-5, Jude 6, Matthew 12:43-45, Luke 8:26-40, Mark 5:5, 9:14-27, 38-40, Acts 8:7, 16:16-18, Leviticus 17:7, Deuteronomy 32:17, 2 Chronicles 11:15, Psalm 106:37, Matthew 12:24-29, Mark 3:27, Luke 11:21-22, and Matthew 7:21-23.