He may also be talking about schizophrenia when he says "I hear them shout". He went inside his head to his secret place and he probably started hearing voices, maybe eventually becoming visual hallucinations. Now they won't go away.
The personalities created with schizophrenia are really just pieces of yourself. Dave must've found his lost soul by realizing that he'd broken himself.
He may also be talking about schizophrenia when he says "I hear them shout". He went inside his head to his secret place and he probably started hearing voices, maybe eventually becoming visual hallucinations. Now they won't go away.
The personalities created with schizophrenia are really just pieces of yourself. Dave must've found his lost soul by realizing that he'd broken himself.
That's what I got from the song, anyway.