No other prophetic book rivals Isaiah’s clear message, powerful imagery and confident hope in God’s future deliverance. His vision of God’s glory and holiness in chapter 6 permeates the whole book, and he never tires of correcting misplaced faith in power or false gods. While many scholars divide the book with the gap of about 150 years between chapters 39 and 40, Wegner highlights the unified message of the book with its three Introductions (Isa. 1:1; 2:1; 13:1) paired with its three refrains (Isa. 48:22; 57:21; 66:24), with both parts illuminating God’s glorious plan for his people.