Now the Spirit of Yahweh departed from Saul, and an evil spirit from Yahweh troubled him.
The subject of demon possession is a vast one; and we have written many comments upon it in our N.T. series; and there are far too many unknown factors evident in human behavior today to support any intelligent denial that demon possession may still exist.  One thing, however, is certain. Demonic forces may not afflict men without God's permission.