For an ancient text dealing with the question of self-control and consciousness, look at a point before the story of the first murder in the pentateuch, where God talks to Cain about his state-of-mind before Cain murders Abel:

  Then the Lord said to Cain,
  “Why are you angry?
   Why is your face downcast?
   If you do what is right, will you not be accepted?
   But if you do not do what is right,
     sin is crouching at your door;
     it desires to have you, but you must rule over it.”

This text was composed into its current long after the mythical-or-real Cain existed, and probably written down only centuries after that. The original composition likely was before the 3K-years-ago dawn-of-consciousness that Jaynes stipulates.

The interesting thing about the passage is:

  * there's still an either-real-or-self-manufactured deity involved
  * Cain struggles in an apparent self-aware way with jealousy and rage
  * he's explicitly aware of the need to modify his perception
  * there's still a "bicameral mind" but it's integrated into consciousness

From either Cain's perspective, the author's perspective, or the ancient reader/hearer's perspective, I think this passage is fascinating.