Conscious mind is a spatial analog of the world and mental acts are analogs of bodily acts. Consciousness operates only on objectively observable things. Or, to say it another way with echoes of John Locke, there is nothing in consciousness that is not an analog of something that was in behavior first.
Julian JaynesThe importance of writing in the breakdown of the bicameral voices is tremendously important. What had to be spoken is now silent and carved upon a stone to be taken in visually.
Julian Jaynes