Some translations indent each line of poetry to make it easier to read. The ULB does this with the poetry that is quoted from the Old Testament in 2:9 and 2:16
Paul continues the discussion from the first chapter contrasting human and God's wisdom. For Paul, wisdom can be simple. He said the wisdom from the Holy Spirit is the only true wisdom. Human ideas are foolish. Paul uses the phrase "hidden wisdom" in referring to truths that were not previously known. (See: [[rc://en/tw/dict/bible/kt/wise]] and [[rc://en/tw/dict/bible/kt/foolish]])