I think this song is about someone entering a depression either due to life stress in general, how messed up the world has become around them or chronic illness / pain and his depression has made him feel isolated from everyone else around him. He becomes so aware of his alienation that he can't seem to find a way out. An umbra is a shade or shadow, and this person feels like hey have a big dark cloud hanging over them they can't get out from under. (Wake me with a bottle 'cross the head
I'll sleep 'til it's over and I'm sober again) this is the person begging for someone to help them out from under the umbra they are stuck beneath. All they know is depression and suffering and all they can seek now is a map or a plan of action to release them from their personal hell.
I think this song is about someone entering a depression either due to life stress in general, how messed up the world has become around them or chronic illness / pain and his depression has made him feel isolated from everyone else around him. He becomes so aware of his alienation that he can't seem to find a way out. An umbra is a shade or shadow, and this person feels like hey have a big dark cloud hanging over them they can't get out from under. (Wake me with a bottle 'cross the head I'll sleep 'til it's over and I'm sober again) this is the person begging for someone to help them out from under the umbra they are stuck beneath. All they know is depression and suffering and all they can seek now is a map or a plan of action to release them from their personal hell.