to be included, although he knows that the entire Vision (from 1:2–4, 2:5–9, and on) argues that history will show otherwise. So throughout the Vision, the writer depicts his role as extending and applying Isaiah’s words and work. The book is properly named “Isaiah” because it applies his prophecies to three centuries of Israel’s history with God. Historical-critical study of Scripture raised questions about the sources behind the canonical book of Isaiah. Assuming