Some writers distinguish between the phrases “kingdom of heaven” and “kingdom of God” in the New Testament, asserting they are intended to mean different things. This post from KJVBible.org is a typical example. Gaines R. Johnson claims, “Knowing the doctrinal difference between the terms ‘Kingdom of Heaven’ and ‘Kingdom of God’ is the key to understanding the complete time line of Biblical history past, present, and future, the proper place of the Church and the prophetic future of Israel.”
That’s a stack of pretty impressive claims, and it warrants a bit of investigation.
