" Technically, flow is defined as an optimal state of consciousness where we feel our best and perform our best. And you’ve probably had some experience with this state. If you’ve ever lost an afternoon to a great conversation or become so involved in a work project that all else was forgotten, then you’ve tasted the experience. Flow describes these moments of total absorption, when we become so focused on the task at hand that everything else falls away. Action and awareness merge. Time flies. Self vanishes. All aspects of performance—mental and physical—go through the roof. "

― Peter H. Diamandis , Bold: How to Go Big, Create Wealth and Impact the World