This is a republished interview with Matthew Bates on his book “Gospel Allegiance: What Faith in Jesus Misses for Salvation in Christ” (Brazos Press, 2019). Bates recently published a new book called “Why the Gospel? Living the Good News of King Jesus with Purpose” (Eerdmans, 2023). Whereas Bates new book focuses on *why* the gospel was given, this present conversation is a helpful precursor as it focuses on *what* the gospel is. We discuss some of the central arguments made in “Gospel Allegiance”, including Bates' understanding of the pistis ('faith/faithfulness') word group, euangelion ('gospel'), and the relationship between these concepts and others in the Bible, especially the New Testament.