Dispensationalism versus God's Claim of the World.

"From the rising of the sun to its setting, My name will be great among the nations, and in every place incense will be offered to My name, and a pure offering. For My name will be great among the nations" (Malachi 1:11). 

Part of what convinced me of postmillennialism is passages in Scripture like the one quoted above. God has claimed as His privilege to be worshiped, not just by Israel, and not even by a few Gentiles mixed in, such as Ruth, by rather by all the nations (see the Great Commission, Matthew 28:18-20). I think that there is great significance in the fact that this declaration occurs in the last book of the Old Testament, the last Scripture written before the coming of its fulfillment in Jesus Christ. "For I am a great King, says the Lord of hosts, and My name will be feared among the nations," He announces through the prophet (Mal. 1:14). 

There is a great failure among God's people to grasp God's plans for the conversion of the world, and to carry out our duties under that plan. Instead, we have surrendered the world to the realm of Satan, and congratulated ourselves for upholding the other-worldliness of the Kingdom of God. Yet that is the error of Gnosticism, the belief that the material world is evil, and only spiritual things belong to God. This is what dispensationalism has done to the American church. 

Prophet Malachi