19. Why Some Scholars Call Isaiah the "Fifth Gospel"

The Book of Isaiah is one of the most sweeping, complex, and consequential books in the entire Old Testament, and in this episode, Dr. Kathryn Schifferdecker and Katie Langston sit down with Old Testament scholar Dr. Michael Chan for a summary of the Book of Isaiah that brings it to life. Dr. Chan explains how Isaiah grew over centuries across three major historical horizons: the Assyrian period, the Babylonian exile, and the Persian period, shaped by generations of scribes writing in Isaiah's name. From the famous "voice crying in the wilderness" in chapter 40 to the haunting Suffering Servant passage in Isaiah 52-53, this conversation covers the key themes, people, and moments that make Isaiah so remarkable.Dr. Chan also makes the case that you simply cannot understand Christian theology, or Jesus' own self-understanding, without reading the Book of Isaiah. Called by some "the fifth gospel," Isaiah's fingerprints are all over the New Testament, from Advent texts to Handel's Messiah. Whether you're a first-time reader or a seasoned Bible student, this episode will help you approach Isaiah's dense Hebrew poetry with patience, curiosity, and a capable guide alongside you.