But if I by the Spirit of God cast out devils, then is the kingdom of God come upon you.
I think, the direct meaning is that the kingdom of God is when demons are cast out, both in the sense of individual sanctification and in historical sense for all men. There are references to the Kingdom both in the sense of personal theosis and historically:
And Jesus seeing that he had answered wisely, said to him: Thou art not far from the kingdom of God. (Mark 12:34)From that time Jesus began to preach, and to say: Do penance, for the kingdom of heaven is at hand (Matthew 4:17)
“I think, the direct meaning is that the kingdom of God is when demons are cast out,”
Did the kingdom of God come in the person of Jesus Christ or did it come, like in the Old Testament, on Jesus when He was healing, exorcising, teaching etc.? In other words, is the exorcism the evidence that it has come or does it come and go as gifts are exercised or good works are done?