> Focus is required to learn to put together puzzles or execute a tennis serve or even play the piano. But after a skill is mastered, it recedes below the horizon into the fuzzy world of the unconscious. Thinking about it makes it harder to do.
It makes me think of consciousness like training AI neural networks. Consciousness is akin to training a neural net by testing the result and triggering the reward function accordingly, whereas the subconscious is when you don't bother checking the result, you just "execute" the neural net from the control signal and take whatever result.
I'm sure the analogy breaks down quite heavily, but it works pretty well as a simplification: when you're learning you're constantly providing yourself feedback to try to strengthen the neural pathways that led to a positive result through a reward system ("good, that was the right note", "bad, that was the wrong note"). But presumably once those neural pathways are satisfactorily shaped, trying to use that reward system (ie. "thinking about" what you're doing) could serve to just mess you up. Because you don't want to modify those neural pathways further if they were already "good" to begin with. (Problem is, I don't think you're ever not conscious of whether your piano playing sounds right, so your brain is always going to be mutating those pathways whether you want to or not. But if you're already good at the piano, the less you can think about your playing, the better.)