Our Lord taught that the royal authority and power of God--God's reign as King--was at hand, and so the Lord in the archetypal prayer tells us to pray thusly, "Your kingdom come, Your will be done on earth as in heaven".
Fundamentally the Christian does not look toward escape from the world into some sweet celestial by-and-by, but instead confesses the redemption of the world that is from God in and through Jesus Christ. "Your kingdom come", may what Christ has said be true, that the least are greatest, that blessed are the poor, the hungry, and those who suffer. "Your kingdom come" as we see in the Lord who sits and dines with prostitutes, lepers, and sinners.
The kingdom of God is not like the temporal powers of this world. God is not a king like Caesar or Herod, Jesus is not a Zealot who will lead a violent uprising against the temporal powers. Instead Jesus will show us what the kingdom of God looks like, by kneeling down and washing the feet of His disciples, by having supper with the tax collector Zaccheus, and by offering His life on the cross, nailed between two brigands, crying out "Forgive them Father, they don't know what they do."
The kingdom of God is at hand, not through power, glory, might. Not in flashiness, pomp, or obvious significance. The kingdom of God is at hand through he suffering Son of God who offers His life as a ransom for sinners, who renders the powers of the world impotent. What is Caesar or Herod or Pilate or Caiaphas in light of the cross-bearing King? Nothing. Their power is temporary, their kingdom fleeting, their glory worthless. Instead God has vindicated the Crucified King, raising Him from the dead and seating Him at His right hand, the Son of Man before the Ancient of Days being given all power, dominion, and authority. His authority is not exercised by the sword, but by service. His dominion is not through the struggle for dominance, but in the preaching of forgiveness. The sword that proceeds out from His mouth is His word of Gospel, that forgiveness of sins are preached in His name, the Gospel that goes forth to the poor, the captive, and the oppressed. His sword is His word by which He says, "Come to me all who are heavily burdened, and I will give you rest."
A kingdom with a banquet where beggars, prostitutes, tax collectors, and the "worthless" are the guests of honor. This is the Gospel of God's kingdom, which is for you, me, and the whole world. That by His broken body and shed blood we have peace with God, and God will set the world to rights; this He does by giving us the promise of life which we have in His Son by the Holy Spirit through faith, and in full at Christ's coming in glory on the last day. World without end.
-CryptoLutheran