Four Wake-up Calls and a Departure Call: In 50:4 the subject suddenly changes again—in two senses. The grammatical subject is once again a human “I” rather than a divine “I,” and the thematic subject is the pressure upon this human “I.” In both respects the passage parallels 49:1–6, and it will emerge that 50:4–52:12 forms a sequence parallel to 49:1–50:4, analogous to double sequences we have noted earlier in chapters 40–55. The arrangement of sections is not as tightly parallel as in earlier instances, but the parallelism again means that the second sequence develops issues raised in the first. Here, as there, that involves discussion of the role of Yahweh’s servant (50:4–11 as 49:1–6), but here the destiny of Zion and the way the destiny of the Babylonian community relates to it (51:1–5…