Amazing and breathtaking powerful message. Those lyrics have a lot of substance in them. Not only because of the wise implications, but because, as thought provoking as they are, there is in them philosophy history. "Hell is other people", comes from the french existencialist Jean Paul Sartre. The thought of dying alone between the trees, to doubt one's own existence, or the reality of this one in relationship to the rest of consciousness, comes from the empirist David Hume, whos theory of perception is a classic among others.
Esse est percipi
Have a great day.