I hadn’t planned to do this, I explain. A week ago, pulled to my desk by what felt like a gravitational force, I fired up my laptop, opened a blank document, and wrote for hours, as if a dam had broken. I felt like myself again, but different—more free, more relaxed, more alive—and I was experiencing what the psychologist Mihaly Csikszentmihalyi calls “flow.” It wasn’t until I began yawning that I stepped away, noticed the time, and climbed into bed. I was tired, but in an energized way, ready for rest after having been awakened.
