I believe that this song is about not blindly following what others say about other worlds, like Heaven and Hell, and instead attempting to solve the problems that already exist on this Earth. I don't follow a religion, but I hear almost every religion saying that their god said, "Whatever you do to the least of my children, you do to me." And right now, all those who set themsleves on Heaven will end up in Hell. Because if you think of yourself, then you are ignoring the least of your brothers and the words of your god.