Mark 5:10

(Vict. Ant. e Cat. in Marc.) Luke, however, says, into the abyss. (Luke 8:3.) For the abyss is the separation of this world, for devils deserve to be sent into outer darkness, prepared for the devil and his angels. This Christ might have done, but He allowed them to remain in this world, lest the absence of a tempter should deprive men of the crown of victory.

(ubi sup.) Who dwelt in the tombs, because they delighted in dead works, that is, in sins; who were ever raging night and day, because whether in prosperity or in adversity, they were never free from the service of malignant spirits: again, by the foulness of their works, they lay as it were in the tombs, in their lofty pride, they wandered over the mountains, by words of most hardened infidelity, they as it were cut themselves with stones. But he said, My name is Legion, because the Gentile people were enslaved to divers idolatrous forms of worship. Again, that the unclean spirits going out from man enter into swine, which they cast headlong into the sea, implies that now that the people of the Gentiles are freed from the empire of demons, they who have not chosen to believe in Christ, work sacrilegious rites in hidden places.

(ubi sup.) But by the public declaration of the scourge which the madman suffered, the virtue of the Healer appears more gracious. And even the priests of our time, who know how to cast out devils by the grace of exorcism, are wont to say that the sufferers cannot be cured at all, unless they in confession openly declare, as far as they are able to know, what they have suffered from the unclean spirits in sight, in hearing, in taste, in touch, or any other sense of body or soul, whether awake or asleep. It goes on, And he besought him much that he would not send them away out of the country.

Here again the demoniac is the people of the Gentiles, in a most hopeless case, bound neither by the law of nature, nor of God, nor by human fear. Or they are choked in hell without any touch of mercy by the rushing on of an early death; which evils many persons thus avoid, for by the scourging of the fool, the wise is made more prudent.