[T]he kingdom of God is in the midst of you. (Lk 17:20-21)
No.........Christ stated that the Kingdom of God rests within the believer.......he said nothing about when the keys to the kingdom would be used in Luke 17:20-21 Read the context of the entire passage of scripture and it explains that they are conversing about the kingdom and when it should come. Read the pervious passage, Luke 17:20, "And when he was demanded of the Pharisees, WHEN THE KINGDOM OF GOD SHOULD COME (meaning that it was not there at the specific come it was to come...i.e., in the future), and he answered them and said, "THE KINGDOM OF GOD COMETH (yet to come),NOT WITH OBSERVATION."
Then he goes on to clear up the confusion of those who did not comprehend, "Neither shall they say, Lo here! or Lo there!, for, behold, THE KINGDOM OF GOD IS WITHIN YOU (not in the midst of you.....but specific to the individual)" -- Luke 17:20
He declared the kingdom is within YOU. You is a 2nd person pronoun. A 2nd person pronoun refers to a PERSON being addressed by the writer.
Jesus stated clearly with no ambiguity whatsoever, "..........My kingdom is not of this world...........but now My kingdom is not hence from here." -- John 18:36 "HENCE": not at this time. Example: "A year hence it will be forgotten" Meaning the kingdom was hence from that time He was speaking.
I find it strange that certain cults must use their own translation of the Holy Scriptures instead of simply accepting the universal translations that have came though the process of Comparative contextual Analysis.....Translations that are verified with this process such as the King James, the New King James, the American Standard.....the New American Standard, English Standard version, etc.,,
If we use your translation then we must allow it to contradict other passages of scripture. The Kingdom of God is addressed numerous places in the scriptures. (John 18:36), .....kingdom not of this world. The kingdom could not be an earthly kingdom because of the Prophecy foretold in the old testation. Jeremiah prophesied that "Coniah" would be the last of the independent, sovereign kings of that nation, "For none of his descendants shall prosper, sitting on the throne of David, and ruling any more in Judah" (Jer. 22:30) Jesus was the fleshly descendent of Coniah who was also known as "Jeconiah" (Matthew 1:11; therefore, Jesus will never rule from David's throne in an earthly manner.....as He is forbidden by God to set on the throne in Jerusalem.. It is true that Jesus sets on the throne of David but not in Jerusalem.....in heaven at the right hand of God (Luke 1:32, Acts 2:30)
Its a spiritual kingdom that Christ sets in rule, not a physical kingdom, not of this world as He stated. (John 18:36)\
He (Christ) clearly stated, "There are some standing here who shall not taste of death tell they see the kingdom of God." -- Luke: 9:27
Unless there are 2000 year old people walking around...........the kingdom of God has existed since the day of Pentecost when Peter preached its first gospel sermon (Acts).
The reign of Christ can't exist at Christ's 2nd resurrection as that is when the kingdom ends and the throne turned back to the Father (God) -- 1 Cor. 15:24-25.
Jesus sets in rule NOW........and has since Peter used the keys to open the spiritual kingdom of God on earth. Paul has written us that the Father, "has delivered us from the power of darkness and conveyed us into the kingdom of the Son, of His love, in whom we have redemption through His blood, the forgiveness of sin." -- Col. 1:13-14
Entrance into this kingdom is predicated on rebirth, as Jesus declared, "Most assuredly, I say to you, unless one is born of water and THE SPIRIT, he cannot enter the kingdom of heaven." -- John 3:5, with the application of water being a clear reference to water baptism (Acts 10:47, 1 Peter 3:20-21).
Conclusion; THE KINGDOM of GOD, the KINGDOM OF HEAVEN, and the KINGDOM of the SON are all in reference to the church that Christ established, he being the cornerstone, with Peter having the keys to open that kingdom on earth in order to be spiritually conveyed into the kingdom through a symbolic death of the physical body....being buried in water to arise new without sin......just like new born child.........The CHURCH is that KINGDOM.
Its not water that saves you.....its the faith you have in believing the process as described in scripture. It takes Faith and Works as they work in harmony. One is worthless void of the other. (James 2:14-26) If you have faith, you must work with faith in doing the righteous work of the kingdom. Faith and Works do not contradict one or the other.......they work together, as James stated, "Faith without works is dead........"
The demons believe in fear and trembling, "You believe there is one God. You do well, Even the demons believe and tremble....." -- James 2:19 Just believing will not save you........you must act on that faith.