Some translations set poetry farther to the right than the rest of the text to show that it is poetry. The ULB does this with the poetry in verses 25-29 and 33 of this chapter. Paul quotes all of these words from the Old Testament.
Paul uses the word "flesh" in this chapter only to refer to Israelites, people physically descending from Abraham through Jacob, whom God named Israel. (See: [[rc://en/tw/dict/bible/kt/flesh]])
In other chapters, Paul uses the word "brother" to mean fellow Christians. However, in this chapter, he uses "my brothers" to mean his kinsmen the Israelites.
Paul refers to those who believe in Jesus as "children of God" and "children of the promise."
Paul explains that while some Gentiles accepted Jesus as their savior by believing in him, most Jews were trying to earn their salvation and so rejected Jesus. Paul, quoting the Old Testament, describes Jesus as a stone that the Jews stumble over when walking. This "stone of stumbling" causes them to "fall." (See: [[rc://en/ta/man/jit/figs-metaphor]])
Paul uses the word "Israel" in this verse with two different meanings. The first "Israel" means the physical descendants of Abraham through Jacob. The second "Israel" means those who are God's people through faith. The UDB reflects this.