And in the synagogue there was a man, which had a spirit of an unclean devil, and cried out with a loud voice, A spirit of an unclean devil - As demon was used both in a good and bad sense before and after the time of the evangelists the word unclean may have been added here by St. Luke, merely to express the quality of this spirit. But it is worthy of remark, that the inspired writers never use the word δαιμων, demon, in a good sense. See the whole of this case explained, Mark 1:23 (note), etc.
Related Commentaries of Luke 4:33
Luke 4:33
33 And in the synagogue there was a man, which had a spirit of an unclean devil, and cried out with a loud voice,