In my youth I was able to do the entire "Hard Rain's Gonna Fall" written by Dylan after about a half dozen 'goings through'. Finished writing one with a friend a few days back and it's a good thing we wrote the lyrics down because today I can recall about one stanza.

Problem may be that writers can and sometimes do get very prolific, and the exploration of images and 'poetic stuff' gets all tangled up in our brains. Problem could also be that we're aging and thinking lots of different things all at once.

Show me a man with soul so dead
Who never to himself hath said,
"Did I come here to take a pee or was I going to wash my face?"