The gospels are hid from those who are lost.
"Thy Kingdom come, thy will be done,
on earth as it is in heaven......
This is the Kingdom that was preached when Jesus walked the earth, and even after He'd resurrected. Peter and the remnant still preached that the Kingdom was at hand.
Jesus was teaching the Apostles to pray while they waited for that KINGDOM ON EARTH, where Jesus would sit on David's throne. (ZION - Jerusalem) The Jews were living under Roman rule, and when their Messiah arrived, they knew the Kingdom was at hand.
Paul never preaches about the Kingdom on earth.
Ours is a spiritual kingdom. Plain and simple. Until you figure that out, you'll continue to get dizzier and dizzier as your post above makes clear.