JESUS IS LORD!
Although it might seem obvious, one thing is crucial when considering the Kingdom. That is, understanding that the King of the Kingdom is God (Father, Son, Holy Spirit) and not Jesus.
Believers know that Jesus is King of kings and Lord of lords (1 Timothy 6'15, Revelation 17'14,19'16). But for His People in this age God has ordained Him to be known as Lord.
As the Paul apostle confirms:
“... no one speaking by the Spirit of God calls Jesus accursed and no one can say that Jesus is Lord except by the Holy Spirit,” 1 Corinthians 12'3.
“Therefore God also has highly exalted Him and given Him the name which is above every name,
that at the name of Jesus every knee should bow, of those in heaven, and of those on earth, and of those under the earth,
and that every tongue should confess that Jesus Christ is Lord, to the glory of God the Father,” Philippians 2'9-11.
The relationship of Jesus to the New Covenant Kingdom of God was that, not only is He its Author, but He was the Ambassador of it on earth.
He demonstrated it for about three and a half years and made it quite clear, especially to some crafty Pharisees by telling them that “The Kingdom of God is among you” (Luke 17'21).