The kingdom of God is a spiritual kingdom with spiritual citizens and a spiritual king. When a person repents of living in the ways of the world and is born again by the power of the Holy Spirit, that person becomes part of the kingdom of God.
Such a person, though still living in this physical world and needing to use the infrastructure of the physical world, is no longer governed by the spirit that prevails among the citizens of the physical world. He now owes his allegiance to the lord of lords and king of kings, Jesus Christ.
Emotions and impulses that are characteristic of the physical world: jealousy, envy, hatred, lust, fear, pride and malice, have no value in the spiritual kingdom. The Holy Spirit empowers people to love, to forgive, to be patient, to be peaceful and to rejoice in the little things that bless each day of their lives.
Citizens of the heavenly kingdom differ from one another in many ways. They are male and female, rich and poor, speak different languages, have different physical appearances. It is the presence of the Holy Spirit in their hearts, unseen to the natural eye, that causes them to feel an affinity with one another.
All earthly kingdoms are ruled by the same unseen lord: the old serpent, called the devil and Satan. He shows himself as an angel of light, promising an earthly paradise. Yet he is always working to divide people from one another. He leads people to mistrust one another, within a country, a home, and even in a church. Wherever one finds a spirit of division, that is the work of this enemy.
Citizens of the heavenly kingdom need to be aware of this undercover warfare and beware when thoughts of distrust, fear and anger present themselves. This way leads to spiritual death. We must choose to trust our sovereign Lord, to walk in peace and love. We must choose life.