let's take a look at the "topic" of the kingdom of God.
"To you has been given the mystery of the kingdom of God, but those who are outside get everything in parables." Mark 4:11
"For I want you to know how great a struggle I have on your behalf and for those who are at Laodicea, and for all those who have not personally seen my face, that their hearts may be encouraged, having been knit together in love, and attaining to all the wealth that comes from the full assurance resulting in a true knowledge of God's mystery, that is, Christ Himself." Col. 2:1 - 2
"The kingdom of heaven may be compared to a man who sowed good seed in his field." Matt. 13:24
"Now the promises were spoken to Abraham and to his seed. He does not say, 'And to seeds,' as referring to many, but rather to one. "And to your seed, that is, Christ." Gal. 3:16
"But seek first His kingdom and His righteousness, and all these things will be added to you." Matt. 6:33
"He is also head of the body, the church; and He is the beginning, the firstborn from the dead, so that He Himself will come to have first place in everything." Col. 1:18
"The kingdom of heaven is like a treasure hidden in the field, which a man found and hid again; and from joy over it he goes and sells all that he has and buys that field." Matt. 13:44
"But we have this treasure in earthen vessels, so that the surpassing greatness of the power will be of God and not from ourselves."2 Cor. 4:7
"The kingdom of heaven may be compared to a king who gave a wedding feast for his son." Matt. 22:2
"He who loves his own wife loves himself; for no one ever hated his own flesh, but nourishes and cherishes it, just as Christ also does the church, because we are members of His body."Eph. 5:28b - 30
"For the kingdom of heaven is like a landowner who went out early in the morning to hire laborers for his vineyard." Matt. 20:1
"I am the vine, you are the branches; he who abides in Me and I in him, he bears much fruit, for apart from Me you can do nothing."John 15:5
It should by now be apparent to you what our definition of the kingdom of God should be. The kingdom is not another topic to be studied with principles that need to be obeyed. The kingdom of God is a Person and we have been called to intimately know and live by means of this wonderful Person.
"Some Pharisees asked Jesus when God's kingdom would come. He answered, "God's kingdom isn't something you can see. There is no use saying, 'Look, here it is' or 'Look! There it is.' God's kingdom is here with you." Luke 17:20, 21
The Lord was talking about Himself. He was standing right there in their midst. The kingdom was among them because He was among them! He IS the kingdom. The kingdom of God is the place where God is first, God rules, and God is all. That place is inside of the Person of Christ.
It's interesting that Paul doesn't have much to say about the kingdom using those exact terms. He only mentions "the Kingdom" a few times and yet Jesus spoke about it constantly. I believe that the reason for this is that Jesus was mainly speaking to Jews and he was cracking wide open their mindset (along with the filters) about the kingdom. They had the political mindset about the kingdom and he came to show them that He was the kingdom. Instead, Paul was speaking mostly to Gentiles and he uses the phrase "in Christ." He uses that phrase over two hundred times in his writings. They both refer to a location. A location that is a glorious Person!
In the Old Testament the kingdom and the land of Canaan were synonymous. Of course, the kingdom of Israel and the physical land of Canaan are only pictures and shadows of the true reality. This reality is Jesus Christ. Paul uses the picture of the Canaan land to show us the unsearchable riches of Christ. He does it through writing about the inheritance of the saints. In the old covenant, the inheritance was a direct reference to the Canaan land being given to the nations of Israel (Acts 20:32; Col. 1:12).
"Giving thanks to the Father, who has qualified you for a share of the allotted portion of the saints in the light; who delivered us out of the authority of darkness and transferred us into the kingdom of the Son of His love, in whom we have redemption, the forgiveness of sins . . ." Col. 1:12 - 14
We can see here that Paul ties together the allotted portion, which is a reference to the Canaan land (Josh. 14:1) and the kingdom of the Son of His love. This kingdom, this inheritance, this land is none other than the Lord Jesus Christ Himself who is the allotted portion of the believers and the saints!