I first encountered the doctrine of Kingdom Exclusion some 15 years ago, attending a church in Santa Cruz, California. The pastor there asserted, as a parenthesis, that some Christians will dine at the table in the kingdom, while others will serve the table. He explained, briefly, that how we live our lives in the present determines how we will reign in the kingdom.
I recall thinking the idea had merit. Certainly, we are storing up for ourselves treasures in heaven; perhaps, this will be realized as a position we occupy in the kingdom. But I was discomforted by the fact “exclusion” is not explicitly taught in scripture. No matter its appeal to our sensibilities (I recall the pastor was applauded for the statement), if exclusion is not present in scripture, it cannot be asserted doctrinally.