Plato suggests that there are two different worlds; that of the prisoners, watching shadows on the walls of the cave, and that of the animals in the sun. He uses this analogy to distinguish between the educated, enlightened people, and those who haven't seen the light.
It's the assurance of this single truth that bothers me, I think. That those whom he teaches have been so blessed, that they have the duty to teach others about it, to take care of them. There doesn't appear to be any room for other truths, other opinions. No doubt that those who are educated should take an interest in the rest of society, but something about this piece really bothers me, though I can't really decide what it is.