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.
Many scholars believe that there are four songs or poems which Isaiah records about the Messiah. Isaiah 50:4-9 is the third of these songs. They are often called the "servant songs" because they focus on the Messiah being a servant. (See: [[rc://en/tw/dict/bible/kt/christ]])
There are many rhetorical questions in this chapter. These questions prove Yahweh's point and are intended to convince the readers. (See: [[rc://en/ta/man/translate/figs-rquestion]])