What is the kingdom of God? First, it is the paradise, heaven, where we Christians will dwell
and live the life after death. Read Luke 23:39-42: One of the criminals who hung there hurled insults at him: “Aren’t you the Christ? Save yourself and us!” (40) But the other criminal rebuked him. “Don’t you fear God,” he said, “since you are under the same sentence? (41) We are punished justly for we are getting what our deeds deserve. But this man has done nothing wrong.” (42) Then he said, “Jesus, remember me when you come into your kingdom.” There were two criminals crucified together with Jesus Christ at the same time.
One of the two criminals hurled insults at Jesus on the middle cross. He represents unbelievers who are hostile against Jesus Christ. The other criminal represents believers who are in Jesus Christ. The world is ultimately divided between believers and unbelievers. These two criminals represent the people living on the earth. The other criminal confessed that he was a sinner. He asked Jesus for the forgiveness of his sin. He believed that Jesus is God and thus able to forgive his sin. He realized that Jesus is the savior. He acknowledged that Jesus is the owner and the king of the kingdom of heaven. He knew that the kingdom of heaven is the kingdom of God, that the kingdom of God is the kingdom of Jesus, and that Jesus is thus God. This is the reason why he asked Jesus to remember him when Jesus comes into His kingdom. He knew that Jesus is the master key to the heavenly realms. He believed that Jesus is the very Messiah and Christ promised in the Old Testament. He confessed that Jesus is the way, the truth, and the life and that Jesus is the only gate to the kingdom of heaven. He recognized that Jesus was sinless and the Lamb of God taking away the sin of the world by his crucifixion. So, he asked Jesus to have him enter the kingdom of Jesus. Here we see the kingdom of God as the paradise, heaven, where we Christians will dwell and live the life after death.