What does Luke 4:33 mean?
A hallmark of Jesus' earthly ministry was supernatural healing, including freeing people from the influence of demons. Those who heard Him speak noted the authority in His words and His delivery (Luke 4:32; Matthew 7:29; Mark 1:22). When Jesus displayed miraculous power, it served as evidence that His message was truly from God (John 10:25).The man mentioned here is possessed by a demon. Luke refers to this as "the spirit of an unclean demon," literally pneuma daimoniou akathartou. Commentators differ on why Luke specifies that the demon is "unclean." Some suggest he is indicating a particular type of spirit, or one focused on a certain kind of affliction. Others believe that Luke is clarifying to his mostly-Gentile audience that this is an evil spirit—not one of the benevolent spirits in which many Greeks believed.
When it encounters Jesus, the demon will react in fear and loathing, only to be cast out (Luke 4:34–35).