I think the song is about PTSD, which was poorly researched at the time the song was written. I can see it being about relationship, but relationships are often casualties of deployment. Another striking meaning to me, is people fighting Parkinson's or other disabilities involving neurology. Even drug addiction could be a war with shakes. So is the conflict internal or external? Either way, he expects it to continue for a very long time, if not forever. There are just too many nuanced layers of meaning for me to say how you should interpret these powerful words. Have you ever watched someone struggle with just daily life, socially, emotionally, or in practical matters? What feelings do you think they had? Did they have trouble articulating it to you? Poverty of speech? Schizophrenia? Dementia? The author does not expect a good outcome but he still fights, which is how I see the struggles of some unfortunate people. I would really love to hear from anyone who thinks it is about use and misuse of clairvoyance, or telepathically sharing thoughts, like the above "PsychicWarVet" describes. That is probable and so fascinating as yet another meaning. This song is like a crystal. It is clear to everyone looking at it from different angles, and each person takes a different shade with them based on his own life!