There are 2 very distinct interpretations that I have made about these lyrics. The first: The band could be singing about drug use and addiction. Meth specifically destroys the human psyche and the chemicals of the brain. Other substances causes symptoms of delirium, lost focus, insomnia, and oftentimes emotional extremes. Deep despair, flying high on "cloud nine", or absolute, unadulterated numbness. The fight for sobriety and control could be quite apparent in the lyrics, after all, recovery is in essence fixing what's broken. The second: The band could be singing about how soldiers are trained. Going days upon days of no sleep or minimal sleep, creates a sense of numbness. So much in fact that if faced with combat, they're trained to push through a barrage of flying bullets, regardless of how many times and where they are hit or how much blood they lose. In both instances, there is some loss of a sense of what's right and wrong. Addicts are often driven to unspeakable crimes for their next fix, soldiers are virtually robotic in that they must be on auto pilot when given an order that they must carry out. As for what the song really means. Only the band knows!