The three most established forms of lapsing into madness via hearing voices include the following. Hearing your own voice describing your thoughts - like you are right now if you can't read in your head without hearing your own voice, unless of course you cannot read in your head at all, in which case it is your actual voice you're hearing (although it is also possible that you are hearing your own voice in your head at the same time as you are hearing it out loud, if this is the case than you should seek medical advice immediately).