- Verses, lines, rhytm, assonances : what kind of music does the text give off ?
- Images, tropes ( metonymy ..metaphors, comparisons...)
and rhetorics and its figures ( there are many.. syllepsis) what effects does the writer want to produce ? to whom? what is the form and the tone of the text ( a speech, a prayer...)
After analysing those elements, you would have to find convergent ideas or oppositions of ideas that make the text special, interesting paradoxicalor catchy...
Hope it'll help you