This kingdom truly is in us because that which is perfect has come in the spirit of the Believer, The Spirit of Christ reborn in the believer. Christ new birth in us and the old father Satan out of us. We now have a personal Father who is the Creator of all that is.
Christ in you is the only kingdom we have in us. Christ is the only perfect one and He is in us now. Is He come?
1 Corinthians 13:10-13 But when that which is perfect is come, then that which is in part shall be done away. When I was a child, I spake as a child, I understood as a child, I thought as a child: but when I became a man, I put away childish things. For now we see through a glass, darkly; but then face to face: now I know in part; but then shall I know even as also I am known. And now abideth faith, hope, charity, these three; but the greatest of these is charity.
Colossians 1:26-28 Even the mystery which hath been hid from ages and from generations, but now is made manifest to his saints: To whom God would make known what is the riches of the glory of this mystery among the Gentiles; which is Christ in you, the hope of glory: Whom we preach, warning every man, and teaching every man in all wisdom; that we may present every man perfect in Christ Jesus:
Is Christ made manifest now, "revealed", this is the perfection 1 Cor is speaking about, that which is come, He, Christ Himself in the believer, this is our hope of Glory.
In always knowing Christ is in us, we have every thought captive to the mind of Christ that is given us, and we pray or communicate with Him always. He should be at the forefront of every thought. The life I now live I live by the Faith of the Son of God; Galatians 2:20 I am crucified with Christ: nevertheless I live; yet not I, but Christ liveth in me: and the life which I now live in the flesh I live by the faith of the Son of God, who loved me, and gave himself for me.
In Him and the Father, taught by the Holy Spirit in us:
Phillip