Jaynes proposed that until about 3,000 years ago, humans lived their lives with their conscious and subconscious minds fully integrated. When the subconscious developed a plan or had an intuition, humans heard this as a "voice" inside their heads, which they often interpreted to be the voices of gods or ancestors. Then something happened: the "narrator" voice of the conscious mind assumed dominance, and the subconscious mind's processes became more submerged. Still, there are a great many activities which we perform better when we can quiet our "narrator voice": driving a car, hitting a golf ball, playing a musical instrument or typing on a keyboard all go better when we can get our narrator voice to stop conducting traffic, saying "do this, now do that", and just let things flow. And yet, despite the advantages of this mode of operation, most of us have been taught to be suspicious of those moments when we stop narrating: we're told to stop daydreaming, get our minds back in the game, and so on.
http://imaginingthetenthdimension.blogspot.com/2011/11/duality-and-consciousness.html