“But if I cast out devils by the Spirit of God, then the kingdom of God is come unto you.”
King James Version (KJV)
12:26 How shall his kingdom be established - Does not that subtle spirit know thin is not the way to establish his kingdom?
12:27 By whom do your children - That is, disciples, cast them out - It seems, some of them really did this; although the sons of Sceva could not. Therefore shall they be your judge - Ask them, if Satan will cast out Satan: let even them be judges in this matter. And they shall convict you of obstinacy and partiality, who impute that in me to Beelzebub, which in them you impute to God. Beside, how can I rob him of his subjects, till I have conquered him? The kingdom of God is come upon you - Unawares; before you expected: so the word implies.
12:29 How can one enter into the strong one's house, unless he first bind the strong one - So Christ coming into the world, which was then eminently the strong one's, Satan's house, first bound him, and then took his spoils.
12:30 He that is not with me is against me - For there are no neuters in this war. Every one must be either with Christ or against him; either a loyal subject or a rebel. And there are none upon earth, who neither promote nor obstruct his kingdom. For he that does not gather souls to God, scatters them from him.
Mt 12:28 If I cast out devils by the Spirit of God, etc. If it is the power of God manifest in me, then it demonstrates that I am the expected Messiah King, the Son of David, of whom the multitude spoke. See Mt 12:23.