When the unclean spirit had torn him Luke uses a milder phrase, when the devil had thrown him down: but they agree perfectly as to the meaning; for the design of both was to show, that the devil went out of the man in a violent manner. He threw down the unhappy man, as if he had intended to tear him: but Luke says that the attempt was unsuccessful; for he hurt him nothing Not that the attack was, in no degree whatever, attended by injury, or at least by some feeling of pain; but that the man was afterwards delivered from the devil, and restored to perfect health.

And when the unclean spirit - Still malignant, though doomed to obey - submitting because he was obliged to, not because he chose - he exerted his last power, inflicted all the pain he could, and then bowed to the Son of God and came out.
This is the nature of an evil disposition. Though compelled to obey, though prevented by the command and providence of God from doing what it "would," yet, in seeming to obey, it does all the ill it can, and makes even the appearance of obedience the occasion for increased crime and mischief.

And when the unclean spirit had torn him - And had thrown him down in the midst, Luke 4:35, και σπαραξαν, and convulsed him. Never was there a person possessed by an unclean spirit who did not suffer a convulsion, perhaps a total ruin of nature by it. Sins of uncleanness, as the apostle intimates, are against the body; they sap the foundation of life, so that there are very few of this class, whether male or female, that live out half their days: they generally die martyrs to their lusts. When the propensities of the flesh are most violent in a person who is determined to serve God, it is often a proof that these are the last efforts of the impure spirit, who has great rages because he knows his time is but short.

And when the unclean spirit (o) had torn him, and cried with a loud voice, he came out of him.
(o) See below, (Mark 9:20).

And when the unclean spirit had torn him,.... Not that he had torn any limb from him, or had made any wound in any part of his body; for Luke says, Luke 4:35, that he "hurt him not", but he shook him; and as Luke there says, "threw him in the midst", of the people, or synagogue; and so the Syriac, Persic, and Ethiopic versions read here, "he cast him", or "threw him to the ground": he threw him into convulsions, and laid him prostrate on the floor:
and cried with a loud voice, he came out of him; though sorely, against his will, as his loud cry showed, and being obliged to it by a superior power.

And when the unclean spirit had torn him--Luke (Luke 4:35) says, "When he had thrown him in the midst." Malignant cruelty--just showing what he would have done, if permitted to go farther: it was a last fling!
and cried with a loud voice--the voice of enforced submission and despair.
he came out of him--Luke (Luke 4:35) adds, "and hurt him not." Thus impotent were the malignity and rage of the impure spirit when under the restraint of "the Stronger than the strong one armed" (Luke 11:21-22).

He came out of him. At the command. The whole account shows that there was a real possession by an evil spirit.

A loud noise - For he was forbidden to speak. Christ would neither suffer those evil spirits to speak in opposition, nor yet in favour of him. He needed not their testimony, nor would encourage it, lest any should infer that he acted in concert with them.