Assembling Under the Word

"How is the covenant God to govern his people after the covenant mediator is dead, the one through whose ministry they have been redeemed? The covenant will continue as the covenant God assembles his covenant people under his preached covenant word. Deuteronomy is the mandate for the people of God to assemble under the preached word of God, or to be more accurate, the written word preached. This is why Deuteronomy is not really a law book, but a preaching book." (Christopher Ash, The Priority of Preaching, p. 23)