" Why is a relaxed state of mind so important for creative insights? When our minds are at ease — when those alpha waves are rippling through the brain — we’re more likely to direct the spotlight of attention inward, toward that stream of remote associations emanating from the right hemisphere. In contrast, when we are diligently focused, our attention tends to be directed outward, toward the details of the problems we’re trying to solve. While this pattern of attention is necessary when solving problems an-alytically, it actually prevents us from detecting the connections that lead to insights. “That’s why so many insights happen during warm showers,” Bhattacharya says. “For many people, it’s the most relaxing part of the day. "

― Jonah Lehrer , Imagine: How Creativity Works