If I cast out devils by the finger of God — That is, by a power manifestly Divine. Perhaps the expression intimates farther, that it was done without any labour: then the kingdom of God is come upon you — Unawares, unexpected: so the Greek word implies.
Related Commentaries of Luke 11:20
Luke 11:20
20 But if I with the finger of God cast out devils, no doubt the kingdom of God is come upon you.