"If Christians have the monopoly of salvation, over whom will they rule? And how will this promise be fulfilled, that to faithful servants is given the authority over five or ten cities (Luke 19:17-19)? It is no fun to be king over empty towns. So they will be populated by those who have not been faithful servants. We Christians will be in the heavenly Jerusalem, but there will also be nations walking in its light (Revelation 21:24). The leaves of the tree of life will serve for the healing of the nations (Revelation 22:2), which means that there will be in the life beyond people who need a cure for their souls."