Well, not that I'm necessarily disagreeing with the whole drug assessment thing, but I have another possible scenario. I know at one point during my life after my father died, I was dealing with very deep grief and depression issues, and felt as though I was losing my sanity at times, and how alluring falling into that darkness of insanity really was. So, possibly depression, grief, or suicidal thinking/beginnings of insanity, or a combination of these could be the meaning of this song. I can so easily see this song about my own past struggles. Just my two cents.