Some translations set each line of poetry farther to the right than the rest of the text to make it easier to read. The ULB does this with the poetry in this chapter.
This chapter prophesies about the Jews return from Babylon, but the exile has yet to happen and is still more than a hundred years in the future. These events will show that Yahweh alone is God. (See: [[rc://en/tw/dict/bible/kt/prophet]] and [[rc://en/ta/man/translate/figs-explicit]])