But he, knowing their thoughts, said unto them,
Every kingdom divided against itself is brought to desolation; and a house divided against a house falls.
All Commentaries on Luke 11:17 Go To Luke 11
Ambrose of Milan
AD 397
Herein also He shows His own kingdom to be undivided and everlasting. Those then who possess no hope in Christ, but think that He casts out devils through the chief of the devils, their kingdom, He says, is not everlasting. This also has reference to the Jewish people. For how can the kingdom of the Jews be everlasting, when by the people of the law Jesus is denied, who is promised by the law? Thus in part does the faith of the Jewish people impugn itself; the glory of the wicked is divided, by division is destroyed. And therefore the kingdom of the Church shall remain for ever, because its faith is undivided in one body.
Nor would you think in the compacting together of our limbs any division of power to be made, for there can be no division in an undivided thing. And therefore the appellation of finger must be referred to the form of unity, not to the distinction of power.
At the same time He shows that it is a regal power which the Holy Spirit possesses, in whom is the kingdom of God, and that we in whom the Spirit dwells are a royal house.