In the sixth chapter of St. Mark’s Gospel, we find the account of Jesus sending out the Twelve, two by two, on mission.
The first thing he gave them, Mark tells us, was “authority over unclean spirits.” And the first pastoral act that they performed was to “drive out many demons.”
The reality of evil spirits
When I was coming of age in the ’60s and ’70s, it was common, even in seminaries, to dismiss such talk as primitive superstition — or perhaps to modernize it and make it a literary device using symbolic language evocative of the struggle with evil in the abstract.