Pseudo-Chrysostom
Catena Aurea · Markusevangelium 3
And he called them unto him, and said unto them in parables, How can Satan cast out Satan? And if a kingdom be divided against itself, that kingdom cannot stand. And if a house be divided against itself, that house cannot stand. And if Satan rise up against himself, and be divided, he cannot stand, but hath an end. No man can enter into a strong man’s house, and spoil his goods, except he will first bind the strong man; and then he will spoil his house. Verily I say unto you, All sins shall be forgiven unto the sons of men, and blasphemies wherewith soever they shall blaspheme: But he that shall blaspheme against the Holy Ghost hath never forgiveness, but is in danger of eternal damnation: Because they said, He hath an unclean spirit.
(Vict. Ant. e Cat. in Marc.) The blasphemy of the Scribes having been detailed, our Lord shews that what they said was impossible, confirming His proof by an example. Wherefore it says, And having called them together unto him, he said unto them in parables. How can Satan cast out Satan? As if He had said, A kingdom divided against itself by civil war must be desolated, which is exemplified both in a house and in a city. Wherefore also if Satan’s kingdom be divided against itself, so that Satan expels Satan from men, the desolation of the kingdom of the devils is at hand. But their kingdom consists in keeping men under their dominion. If therefore they are driven away from men, it amounts to nothing less than the dissolution of their kingdom. But if they still hold their power over men, it is manifest that the kingdom of evil is still standing, and Satan is not divided against himself.