Adam Clarke on Matthew 12:25

Every kingdom divided against itself is brought to desolation - Our Lord's argument was thus: - "The welfare of any kingdom, city, or family, depends on its concord and unanimity; Satan, like every other potentate, must wish to rule his empire in peace and security; how then can he be in league with me, who oppose his authority, and am destroying his kingdom?"

The reasoning of the Pharisees, Mat 12:24, was not expressed, and Jesus, knowing their thoughts, gave them ample proof or his omniscience. This, with our Lord's masterly confutation of their reasonings, by a conclusion drawn from their own premises, one would have supposed might have humbled and convinced these men; but the most conclusive reasoning, and the most astonishing miracles, were lost upon a people who were obstinately determined to disbelieve every thing good, relative to Christ. How true the saying - He came unto his own, and his own received him not!