Here is my drawing of the situation in Plato's mythical Cave after the first prisoner has been released from his bondage and dragged up into the world as we know it. As Glaucon and Socrates agree, the enlightened man would remember his fellow prisoners and try to go back to convince them that everything they have known is an illusion. The following is an imaginary conversation:
Guy who has been above ground (Earl): Holy, crap, Gustav -- you're never going to believe this!
Cave Dweller (Gus): Where have you been?
Earl: Listen to me man... this is going to sound crazy, but... see us talking there? On the wall? That's a shadow! It's not real!
Gus: Earl, what's a "wall?" What's a "shadow?" What are you talking about?
Earl: Look, you've gotta dig deep here man -- I know you think that those two dark blotches there are us, but...
Gus: Those two dark blotches there? Where exactly do you think you are, Earl? And don't refer to me as a "blotch."
Earl: Dammit, Gus -- I've seen a glorious other world, where objects have three dimensions... they are wide and tall, as you know them... and also "deep."
Earl: Like, um... look at yourself. That isn't the real you! You're looking at a projection of you, and you're hearing an echo of your voice.
Gus [looking at his shadow]: Oh, really, Earl? So [pointing to his shadow head with his shadow hand] this isn't my head?
Earl: That's right! -- that's just a projection of your head... your real head is so much different, Gus. It's textured, and curvy, and bumpy, and round.
Gus: Listen Earl, you are out of your freakin' mind. You're talking nonsense.
Earl: Okay wait wait wait. Let me tell you a story.
Earl: Okay... so, uh, this world [Earl begins slowly, pointing around his shadow self with his shadow hand] seems very real to you. But, in the future, when you are ready, you're going to "get free" and move to another place that is just barely like this, but totally different.
Gus: That's not much of a story, Earl. Still nonsense. Who are you voting for, anyway?
Earl: What are you--kidding me? You're not listening, man. This. Isn't. Real.
Gus: You ever hear of schizophrenia, Earl?
Earl: Okay, okay... gimme a minute. A story:
Earl: Okay... okay. So, imagine a prisoner who has never seen his shadow--
Gus: Shadow? You keep saying that. What is that?
Earl: I mean -- I'm sorry -- who has never seen himself. Imagine a prisoner who has never seen himself. He's never had vision, since the time he was little.
Earl: Now, let's say your job is to go and tell him that he does have a... uh... a body, like you have. How would you explain it to him? And imagine that all he has to do is open his eyes, but you can't do it for him. He has to do it himself. And remember, he has no notion that he has eyes, because he doesn't know that he has a body.
Gus: Dude, just tell me who you're voting for.
Earl: Dammit, man -- you aren't gettin' it.
Gus: Try another story, maybe?
Earl: Alright... this world is an illusion. You think that that [pointing to Gus' body] is you--
Gus: Damned right I "think" that's me. It is me, Earl.
Earl: Okay, sorry. But what if I told you that there's a "higher" world that's "like a treasure hidden in the field, which a man found, and hid. In his joy, he goes and sells all that he has, and buys that field."
Gus: I dunno, Earl... this is lame. I mean, if there's another mystical "world" somewhere, and you've seen it, why don't you just explain it to me? I mean, what's it like?
Earl: It's brighter and in three dimensions.
Gus: Dude, I don't even know what that means. I can't wait for the election, though.