“Csikszentmihalyi had noticed that many artists became deeply embedded in the business of making art—so deeply that they allowed hours and hours to pass without feeling the need to eat or drink. As Csikszentmihalyi explained, when people experience flow—also known as entering the zone—they become so immersed in the task at hand that they lose track of time. Some report a sense of profound joy or rapture when they enter the zone; a rare, long-lasting euphoria that only seems to arise reliably in these rare situations characterized by challenges and the ability to just barely overcome those challenges.”