I love this poem. It is different and made me think. Its a pity that line 8 and 11 don't quite rhyme. For line 11 try 'Like silent words to muffle' to get it to rhyme. Can't think of how to change line 8 though.
I loved your poem. The rhythm and rhyme seemed to flow really well and I especially liked the verse style change in the middle. I would only change one word. I would change 'The' to 'That in the 9th verse second line. It just seems to sound better but that just might be me.