Kingdom of God Kingdom of Heaven
Response to comment [from a "Christian"]: "I am not a dispensationalist. The Kingdom of Heaven and the Kingdom of God are synonymous.."
The church is in the kingdom of heaven. The church and the kingdom of heaven are in the kingdom of God. See page 3 of Matthew Commentary by J. Vernon McGee.
"Why should we believe this man's [McGee] commentary?"
The kingdom of God includes believers on earth (those saved) and believers in heaven (the angels).