Q. Why does deep work make you a top performer? A. Because it ensures consistent mylenation of those neural-circuits which are needed to get the task at hand done. Mylenation acts like insualtion around those circuits, and it ensures that the next time current flows down them, it flows loss-lessly and across the right nodes. If the network of neurons that are firing represents a "chess move" or a "solving a design problem in a specific domain" - you get that much good at those speciifc things. In this model, the brain is a mega-network of neurons with different levels of mylenation, each sub-net representing an art or skill or memory, and you are accordingly good or poor at those tasks. To be an expert at something, is to be well myelinated. === From MedlinePlus: Myelin is an insulating layer, or sheath that forms around nerves, including those in the brain and spinal cord. It is made up of protein and fatty substances. This myelin sheath allows electrical impulses to transmit quickly and efficiently along the nerve cells. If myelin is damaged, these impulses slow down. This can cause diseases such as multiple sclerosis. Further Reading The Mechanical Basis of Memory - the MeshCODE Theory Rapid conduction and the evolution of giant axons and myelinated fibers Myelin plasticity and behaviour — connecting the dots Myelin Dynamics Throughout Life: An Ever-Changing Landscape?