Original text - Engels - that there is a whole world of sounds about us...

that there is a whole world of sounds about us
all the time that we cannot hear. It is possible
that up there in those high-pitched inaudible
regions there is a new exciting music being made,
with subtle harmonies and fierce grinding discords,
a music so powerful that it would drive us mad
if only our ears were tuned to hear the sound
of it.