In his earlier chapters St. Luke is careful to light his Sabbath lamp, telling that such and such miracles were wrought on that day, because the Sabbath question was one on which Jesus soon came into collision with the Pharisees. By their traditions, and the withs of dry and sharp legalities, they had strangled the Sabbath, until life was well-nigh extinct. They had made rigorous and exacting what God had made bright and restful, fencing it around with negations, and burdening it with penalties. Jesus broke the withs that bound her, let the freer air play upon her face, and then led her back to the sweet liberties of her earlier years. How He does it the sequel will show.
The Sabbath morning finds Jesus repairing to the synagogue at Capernaum, a sanctuary built by a Gentile centurion, and presided over by Jairus, both of whom are yet to be brought into close personal relationship with Christ. From the silence of the narrative we should infer that the courtesy offered at Nazareth was not repeated at Capernaum--that of being invited to read the lesson from the Book of the Prophets. But whether so or not, He was allowed to address the congregation, a privilege which was often accorded to any eminent stranger who might be present. Of the subject of the discourse we know nothing. Possibly it was suggested by some passing scene or incident, as the sculptured pot of manna, in this same synagogue, called forth the remarkable address about the earthly and the heavenly bread (John vi. 31). But if the substance of the discourse is lost to us, its effect is not. It awoke the same feeling of surprise at Capernaum as it had done before among the more rustic minds of Nazareth. There, however, it was the graciousness of His words, their mingled "sweetness and light," which so caused them to wonder; here at Capernaum it was the "authority" with which He spoke that so astonished them, so different from the speech of the scribes, which, for the most part, was but an iteration of quibbles and trivialities, with just as much of originality as the "old clo'" cries of our modern streets. The speech of Jesus came as a breath from the upper air; it was the intense language of One who possessed the truth, and who was Himself possessed by the truth. He dealt in principles, not platitudes; in eternal facts, and not in the fancies of gossamer that tradition so delighted to spin. Others might speak with the hesitancy of doubt; Jesus spoke in "verilys" and verities, the very essences of truth. And so His word fell upon the ears of men with the tones of an oracle; they felt themselves addressed by the unseen Deity who was behind; they had not learned, as we have, that the Deity of their oracle was within. No wonder that they are astonished at His authority--an authority so perfectly free from any assumptions; they will wonder still more when they find that demons, too, recognize this authority, and obey it.
While Jesus was still speaking--the tense of the verb implies an unfinished discourse--suddenly He was interrupted by a loud, wild shout: "Ah, what have we to do with Thee, Thou Jesus of Nazareth? Art Thou come to destroy us? I know Thee, who Thou art, the Holy One of God." It was the cry of a man who, as our Evangelist expresses it, "had a spirit of an unclean devil." The phrase is a singular one, in fact unique, and savours a little of tautology; for St. Luke uses the words "spirit" and "devil" as synonyms (ix. 39). Later in his Gospel he would simply have said "he had an unclean devil;" why, then, does he here amplify the phrase, and say he had "a spirit of an unclean devil"? We can, of course, only conjecture, but might it not be because to the Gentile mind--to which he is writing--the powers of evil were represented as personifications, having a corporeal existence? And so in his first reference to demoniacal possession he pauses to explain that these demons are evil "spirits," with existences altogether separate from the diseased humanity which temporarily they were allowed to inhabit and to rule. Neither can we determine with certainty the meaning of the phrase "an unclean devil," though probably it was so called because it drove its victim to haunt unclean places, like the Gadarene, who had his dwelling among the tombs.