And when he was demanded of the Pharisees, when the kingdom of God should come, he answered them and said, The kingdom of God cometh not with observation: Cometh not with observation - With scrupulous observation. That this is the proper meaning of the original, μετα παρατηρησεως, Kypke and others have amply proved from the best Greek writers. As if he had said: "The kingdom of God, the glorious religion of the Messiah, does not come in such a way as to be discerned only by sagacious critics, or is only to be seen by those who are scrupulously watching for it; it is not of such a nature as to be confined to one place, so that men might say of it, Behold it is only here, or only there: for this kingdom of God is publicly revealed; and behold it is among you; I proclaim it publicly, and work those miracles which prove the kingdom of God is come; and none of these things are done in a corner."
Dr. Lightfoot has well observed that there are two senses especially in which the phrase "kingdom of heaven," is to be understood.
1. The promulgation and establishment of the Christian religion.
2. The total overthrow of the Jewish polity.
The Jews imagined that when the Messiah should come he would destroy the Gentiles, and reign gloriously over the Jews: the very reverse of this, our Lord intimates, should be the case. He was about to destroy the whole Jewish polity, and reign gloriously among the Gentiles. Hence he mentions the case of the general deluge, and the destruction of Sodom and Gomorrah. As if he had said: "The coming of this kingdom shall be as fatal to you as the deluge was to the old world, and as the fire and brimstone from heaven were to Sodom and Gomorrah." Our Lord states that this kingdom of heaven was within them, i.e. that they themselves should be the scene of these desolations, as, through their disobedience and rebellion, they possessed the seeds of these judgments. See on Matthew 3:2 (note).