|St. John Cassian|
"For everything lies at the innermost recess of the soul. When the devil has been chased away from it and when sin is no longer in charge of it, then the kingdom of God is established there. This is what the evangelist conveys to us when he says, 'The kingdom of God will not come as something to be observed nor will people cry -Here it is! There it is! - Amen, I tell you the kingdom of God is within you' (Luke 17-20-21)."