Along with the revelation of God to mankind, Jesus introduced the Kingdom idea - he disappointed some by his refusal to assume a worldly throme, but he established a spiritual kingdom of eternal value - one that is growing still, and one that is open to all. Jesus said: "where the spirit of God teaches and leads the soul of man, there in reality is the kingdom of heaven. And this kingdom of God is righteousness, peace, and joy in the Holy Spirit."
The Rule Of Living
Love is the rule of living within the kingdom—supreme devotion to God while loving your neighbor as yourself
The Urantia Book, (142:1.1)
Seek First The Kingdom
The faith of Jesus visualized all spirit values as being found in the kingdom of God; therefore he said, "Seek first the kingdom of heaven."
The Urantia Book, (196:0.8)
If you would but believe that my Father loves you with an infinite love, then you are in the kingdom of God."
The Urantia Book, (137:8.17)
"I declare that the kingdom of heaven is the realization and acknowledgment of God's rule within the hearts of men."
Jesus, The Urantia Book, (141:2.1)