Computer generated 3D illustration (Photo by mic1805)
Some claim that the kingdom of God will be a physical, earthly kingdom. However, Jesus Christ taught that the kingdom of God was already present in the 1st-century AD.
The coming of the kingdom of God is not something that can be observed, nor will people say, 'Here it is,' or 'There it is,' because the kingdom of God is in your midst.
Jesus Christ to the Pharisees in Luke 17:20-21 (circa early 60's AD)
According to the passage above, Jesus stated that the kingdom of God was already present (i.e., "in your midst") circa 30 AD. Jesus declared the nearness or present reality of the kingdom of God in six additional passages. Conversely, Cerinthus, a contemporary of the apostle John, taught that "the kingdom of Christ will be an earthly one" (Eusebius, Church History, 3.28.4). Cerinthus' heretical doctrine challenges Jesus' statement, "My kingdom is not of this world. If it were, my servants would fight..." (John 18:36). The apostle John further testified to Jesus' global kingship in the 1st-century AD when he wrote the Book of Revelation:
...Jesus Christ, who is the faithful witness, the firstborn from the dead, and the ruler of the kings of the earth.
The apostle John to the seven churches of Asia in Revelation 1:5 (circa late-60's AD)
The apostle John also referred to Jesus Christ as "King of kings and Lord of lords" in Revelation 19:16. John seems to have borrowed that title from the apostle Paul:
...God, the blessed and only Ruler, the King of kings and Lord of lords, who alone is immortal and who lives in unapproachable light, whom no one has seen or can see.
The apostle Paul to Timothy in 1 Timothy 6:15-16 (circa 62-66 AD)
The prophet Daniel likened the kingdom of God to a "rock" or "stone" that grew and "became a huge mountain and filled the whole earth" (Daniel 2:35). Interestingly, God is described as a "rock" nineteen times in the Old Testament. Furthermore, the apostle Paul informs us that Jesus Christ was the "spiritual rock" that accompanied the Israelites in the wilderness (1 Corinthians 10:1-5).
Similarly, Jesus Christ compared the kingdom of God to "a mustard seed, which a man took and planted in his garden. It grew and became a tree, and the birds perched in its branches" (Luke 13:18-19). The apostle Paul stated that Christ was the "seed" (i.e., offspring) that God promised to Abraham through which "all nations on earth will be blessed" (Galatians 3:16; see also Genesis 22:18).
Thus, from the aforementioned passages, we can conclude that Jesus Christ already reigns as "King of kings and Lord of lords" in this world (Revelation 19:16), and that the spiritual kingdom of God will continue to expand until it fills the whole earth. Of course, we look forward to the consummation of the ever-present spiritual kingdom of God with the physical one that is to come at Christ's Second Coming (1 Corinthians 15:24). But until then, Christians must focus on the building up of the Church that Christ said even the gates of hell will not overcome (Matthew 16:18).
Sabz, S. (2014, October 23). Is the kingdom of God a futuristic, physical kingdom, or a current spiritual reality? Retrieved from https://scienceandbibleresearch.com/spiritual-kingdom.html