What does Isaias Chapter 51 say, and which statements belong to its speaker?

Isaias 51 calls justice-seekers to consider their rock and pit of origin and look to Abraham and Sara: one called, blessed and multiplied. Sion's ruins receive comfort and desert becomes a place of pleasure and the Lord's garden, with thanksgiving. Law and judgment go forth as light of nations; the just one and saviour are near and islands wait for the divine arm. Heaven vanishes like smoke and earth and inhabitants wear away, but salvation and justice remain.

Those with law in their hearts are told not to fear reproach or blasphemies; worm and moth consume like garment and wool. A call to the Lord's arm recalls striking the proud one, wounding dragon and drying sea for passage. A named primordial monster and an identical return route are not supplied. Redeemed people return with joy and praise. Comfort answers fear of grass-like mortality and forgetting the creator under oppression.

The one opening comes quickly without utter destruction or bread failing. The Lord troubles sea and waves. Words placed in a mouth and protection in hand-shadow accompany planting heaven, founding earth and naming Sion my people. Jerusalem rises after draining wrath and dead-sleep cup. None of her children upholds her; the text does not say none survived. Desolation, destruction, famine and sword accompany children cast forth and sleeping at road-heads like snared wild ox, not antelope.

The poor one drunk without wine hears that the defending Lord removes the cup forever and puts it in oppressors' hands. They had demanded prostration and used her body as ground and road. The edition's Christ-and-Church reading remains identified rather than supplied as an additional narrated event.