I perceive the kingdom of God to be a state of being whereby we dismantle the walls of our own 'kingdom' thus allowing Jesus to enter and reign in conjunction with the Holy Spirit. Resultantly, our reign consisting of adversity, turmoil and incompetence is transformed and the reign of the 'New King' brings love, peace and joy.  

Moreover, the instigation of Jesus as sovereign King of our domain results in repentance and obedience to his governance. One of his chief commandments were to love others as our self. It therefore follows that we assist other's to break down their kingdom walls, thus allowing them the joy in Christ and spreading the 'good news' as Christ commanded.