QUOTE : The revolution is built on three simple facts. (1) Every human movement, thought, or feeling is a precisely timed electric signal traveling through a chain of neurons—a circuit of nerve fibers. (2) Myelin is the insulation that wraps these nerve fibers and increases signal strength, speed, and accuracy. (3) The more we fire a particular circuit, the more myelin optimizes that circuit, and the stronger, faster, and more fluent our movements and thoughts become.