Unfinished poem of Mayakovsky..

I know the force of the words and warning they can sound
i don't mean those which draw front row applause 
But words at which coffins break loose to pound
the ground this way and that with heavy paws 
They must be cast out publishers ignore them
But words forge on tighten their belly-bands 
ring through the centuries and trains come crawling 
to lick and fondle poetry's horny hands 
I know the force of the words They seem a petal flung
Under the heels of dancers just a trifle 
But man possesses backbone, heart and tongue

Mayakovsky
(1928-1930)