This is definitely about someone in deep depression and suicidal. 'The sulphur man' is death or maybe a personification of the person as death. The 'pills' could be anti-depressants, but I think they more likely represent drug misuse that intensified his depression. 'Fate brought you next to ghosts' suggests that he got into this state as a result of personal suffering, probably the loss of someone close. 'They talk in code, looking for the way out' is people in the same state as this guy all share a common goal that no-one sane can really understand, they want to kill themselves. This guy cannot be helped anymore, he has to save himself, he needs to 'want to live', 'learn to cope' with his problems and 'find what really matters' to him. All anyone else can do is 'hope'.
This is definitely about someone in deep depression and suicidal. 'The sulphur man' is death or maybe a personification of the person as death. The 'pills' could be anti-depressants, but I think they more likely represent drug misuse that intensified his depression. 'Fate brought you next to ghosts' suggests that he got into this state as a result of personal suffering, probably the loss of someone close. 'They talk in code, looking for the way out' is people in the same state as this guy all share a common goal that no-one sane can really understand, they want to kill themselves. This guy cannot be helped anymore, he has to save himself, he needs to 'want to live', 'learn to cope' with his problems and 'find what really matters' to him. All anyone else can do is 'hope'.