Jesus said, "God's reign is within you." That can be read the way we Quakers interpret it: Each and every one of us has "that of God" within us. Or, it can be read to mean "whenever two or more of you are gathered in my name there is love". Both interpretations work for me.
Jesus said, "The realm of God is now." He wasn't saying the kingdom of God is some pie-in-the-sky heavenly reward. He said NOW.
What does that mean? It means this is God's world. We are all children of God. We are all the body of Christ. God is among us, prompting us to do God's work. All we have to do is to become aware and alive to that reality.
What would it be like if we all lived as if we believed that? What would we do? (What would we not do?) How would the world be transformed? How would we, as individuals, be transformed? How would I live if I truly lived under the reign of God?