There is a sub-culture in the twenty-first century that has taken many people spiritually captive, and it has mentally captivated several others. The belief in the supernatural (ghosts, demons, spirits, etc.) is common and, in some ways, mainstream. One only need to look at the plethora of TV shows and movies dedicated to chronicling and promoting possessions, exorcisms, ghosts, and the like. Many Christians have turned a blind eye to this area of society, viewing it as ‘silly’ and ‘unscientific.’ Christians are, in other words, non-supernatural in their outlook on demons. We must ask ourselves, however, if we truly believe the Bible at that point, because the same Bible that tells Christians about the Gospel tells them about the spiritual realm of demons and spiritual warfare (Ephesians 6:12).
How then are Christian suppossed to view such things as ghosts, demonic appearances, and exorcisms? First, we recognize that spiritual forces are real (Ephesians 6:12). Second, we understand that every unbeliever is already under the control of a supernatural, dark power (2 Timothy 2:26) and that the normal way they are freed is by the Gospel’s penetrating work (2 Timothy 2:24-26, Revelation 12:11). Thirdly, we acknowledge that there are rare circumstances in which the presence of darkness and demons is so prevalent that direct confrontation in the name of Jesus Christ is required (see various circumstances in the Gospels and Acts). This is the grid by which we must view these occurences and by which God may allow us to bring more people to repentance and faith.
(See https://www.desiringgod.org/interviews/do-you-believe-we-should-cast-out-demons-today for more details and the source of this blog)