It's about a soldier living with his past experiences post-war. Struggling to stay sane even after all the things he saw that were so terrible he would never wish them upon anyone. He killed people, so he has no soul to sell. Just another lonely broken hero means that he's just one of many soldiers suffering through the same thing. Also, in the second verse, he makes mention of faith guiding him, but in the chorus he says he's running out of faith, because he starts to question if what he did was really right.
It's about a soldier living with his past experiences post-war. Struggling to stay sane even after all the things he saw that were so terrible he would never wish them upon anyone. He killed people, so he has no soul to sell. Just another lonely broken hero means that he's just one of many soldiers suffering through the same thing. Also, in the second verse, he makes mention of faith guiding him, but in the chorus he says he's running out of faith, because he starts to question if what he did was really right.