I have an acquaintance who doesn't expect to live past one more year. He's developed a dependance on drugs and alcohol, and he is a chronic alcoholic. If not for his reason being clouded by poison, he would be a great guy to be around. Yet, even in a drunken stupor, I've seen a glimmer of greatness.
I'm convinced that, because he doesn't expect to live much longer, he simply doesn't care. I can't help someone that doesn't care. His total disregard for his own life has damaged his ability to reason, and once someone looses their ability to reason then they become a mindless zombie. There might still be a chance for him, but only if he finds a reason to go on. I doubt that will ever happen.