Isaiah 9:6: The Child, the Names, the Throne
Isaiah 9:6 answers failed human leadership with a child God himself gives, and with four names that describe the ruler's character rather than a promise of ease for any nation. The zeal of Yahweh of Armies is what performs it.
Isaiah 11:1–2: The Shoot From Jesse's Stump
Isaiah 11:1–2 answers the axe of chapter 10 with a shoot from a stump. God keeps his promise to David's line through a humble, Spirit-filled ruler, not through the proud powers being cut down.