As Linda wrote, poems might "adjust themselves to your own circumstances". And
Laurie explained:
These lines seem to be a very good example for it. Indeed they proved to have worked like a Rorschach inkblot test for at least one reader...The reader always brings their life knowledge with them, which is always different than the writer's life experiences.
The biblical reference, however, is so central that I really should find a way to ensure that readers "get it". Without it, the poem is, like Laurie found, one "with no redemption".
The "Jericho" aspect indicates that the walls "will come tumbling down". Still there are many possible interpretations open. One might simply find a "jazzy" version of the story from the Bible. One might think of a blues musician who overcomes his own autistic tendencies (the wall around himself) through music. Or of a therapist who tried all his techniques without success on a person, and finally resigns to music therapy. Or "whatever your own circumstances" will make you see...
Thanks again for the discussion. And here's the current version:
Josh resigns before Jericho
i tried to tear down the wall:
i couldn't poke a tiny hole.
i'll take the trumpet from my shoulder now
and play the blues real loud and slow.
Cheers
tom
Edit: Corrected the typo.