The scripture for today, December 28 (12/28), is Hebrews 12:28 as found in the New Testament of the Bible:
Notice this is in present tense. The kingdom is not something in the future but is now.
Jesus said in Luke 9:27 that some listening to him would still be alive when the kingdom came. Colossians 1:13 says God HAS (not will) rescued us from the dominion of darkness and BROUGHT (not will) us into the kingdom.
In fact, at the end, Jesus will not come back to earth to set up a kingdom. Instead, he will at that time hand the already-existing kingdom over to the Father (I Corinthians 15:24).
So what does this mean to us? Revelation 1:5-6 says that all who have been freed from our sins by the blood of Jesus have become a kingdom of priests. And as such, we daily offer our bodies as living sacrifices in the service to our king (Romans 12:1).
Christians have dual citizenship. Christians are citizens of the earthly nation they live in, and citizens of the kingdom of heaven. What glory God has already bestowed upon us.