The major theme of "life without principle"

Ihave to write a narrative poem for an english assignment, but i cant come up with any topics/ideas for the poem. any topics?

Which rhetorical device is used in this excerpt from "the danger of lying in bed" by mark twain? "if i am going to travel by rail i shan't need it. lying at home in bed is the thing i am afraid of."

What characteristics show passage 3 to be poetry?