Jesus said His Kingdom was not of this world (realm) (John 18:36). It is a spiritual kingdom, and as such, must never be confused with an Earthly one. To lose this distinction, even when speaking of a Millennial reign, is an error of great dimension.
The Kingdom is not constituted in books of laws, governmental seating, and minted coinage, and the like. Yet, on the other end, it is not without potency in the physical dimension. Consider Jesus’ life and ministry. He said, to paraphrase, “If I cast out demons by the finger of God, then the Kingdom of God has come upon you.” (Luke 11:20). The same is true with healing. Therefore, it was the entrance of the Kingdom which brought about the deliverance in the first place! Somehow, the invisible, spiritual, and “ethereal” had directly, manifestly affected the natural order.