The gospel today tells us that "The Kingdom of God cannot be observed. [...] For behold the Kingdom of God is among you."
The Jews expected a political kingdom. They expected a revolution that will overthrow the domination of the Romans and so bring power and authority to the Jews. A revolution that will end the rule of the Romans over Jerusalem and the surrounding places, in order to establish a Jewish government. But this is not the plan. This is not the Kingdom Jesus came to established.
Jesus proclaimed a kingdom of God where faith and love are primary. It is first and foremost a revolution of the heart. It is a kingdom founded not in power or subjugation, but in love. And so, found in the kind of relationships we have. A relationship that is rooted in being deeply connected to God, and so, rooted in faith. A kingdom that is expressed in the way we live our life of faith.
Relationship and lifestyle - this is how we realize among us God's Kingdom. A loving relationship and a lifestyle of faithfulness - this is how the world knows that we are citizens of the kingdom.