PAGE the Kingdom of Heaven and Kingdom of God was Jesus' main reason for coming to the earth to rule the kingdom. Matthew uses Kingdom of heaven while the other gospel writers, in similar stories and parables, use Kingdom of God. Matthew also uses Kingdom of God. Some truth to these, but Kingdom is more.
Kingdom is now within the believer.
Eternal - Always existed. God rules the heavens. Earthly - God always planned for a Kingdom on the earth with Jesus as the King. Proof of king's, power, is healing ministry. God selects those He grants entrance to His kingdom.