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 2:1-20.
This is an important phrase in Scripture. Paul also uses it to explain that man is justified by his faith. (See: [[rc://en/tw/dict/bible/kt/righteous]], [[rc://en/tw/dict/bible/kt/justice]] and [[rc://en/tw/dict/bible/kt/faith]])