In this passage you sort of wonder what would've happened if Jimmy hadn't gone to Vietnam. If he had stayed and instead of yearning for her love, actually fought to woo her into loving him.
"Okay. The storm stopped pounding.
I am trying to say this straight: for once
I was sane enough to pause and breath
Outside my wild plans and after the hard rain
I turned back on the old curses."
In this passage it is important for the reader to comprehend what he is trying to describe in what he is seeing and hearing. He is still traumatized after the war, trying to forget but he keeps seeing everything that happened and its keeping him from being happy with his wife.