5. Progressive Revelation argues against Exclusive Psalmody.
Here is what the renowned A. A. Hodge had to say about Progressive Revelation in his Outlines of Theology:
The progressive character of divine revelation is recognised in relation to all the great doctrines of the Bible. One of the strongest arguments for the divine origin of the Scriptures is the organic relation of its several parts. They comprise more than sixty books written by different men in different ages, and yet they form one whole; not by mere external historical relations, nor in virtue of the general identity of the subjects of which they treat. but by their internal organic development.
All that is in a full-grown tree was potentially in the seed. All that we find unfolded in the fulness of the gospel lies in a rudimental form in the earliest books of the Bible. What at first is only obscurely intimated is gradually unfolded in subsequent parts of the sacred volume, until the truth is revealed in its fulness. This is true of the doctrines of redemption; of the person and work of the Messiah, the promised seed of the woman; of the nature and office of the Holy Spirit; and of a future state beyond the grave. And this is specially true of the doctrine of the Trinity…
