"There is a repeated line at the end of each verse which is the punishing reason the song exists - the line, “and I can’t shut off my head” is probably one of the worst afflictions human minds can suffer (it is, for sure, a rung below the highest worst “physical pain” that we can’t shut off)…. and the 24 hours, though it is long for a single piece of music, is really only one day…. some minds are not able to shut themselves off for years and years.."