And when he was demanded by the Pharisees, when the kingdom of God should come, he answered them and said,
The kingdom of God comes not with outward observation:
All Commentaries on Luke 17:20 Go To Luke 17
Gregory of Nyssa
AD 394
Or, perhaps, the kingdom of God being within us, means that joy that is implanted in our hearts by the Holy Spirit. For that is, as it were, the image and pledge of the everlasting joy with which in the world to come the souls of the Saints rejoice.