He's not hearing voices, it's his own internal monologue that's out of control.

If you can't control your inner thoughts at a basic level, you should first get your shit together enough to control your inner monologue so it doesn't drive you crazy. Insomniacs have that same problem.

But I wouldn't recommend doctors, just get your shit together, run 5 miles or something, do some dead-lifts, take care of your body and mind.

Maybe he's just messing with us.. that's always a possibility, one of many others.