"In his sobering book Sabbath, the minister and author Wayne Muller observes how often people say to him, "I am so busy." "We say this to one another with no small degree of pride," Muller writes, "as if our exhaustion were a trophy, our ability to withstand stress a mark of real character ... To be unavailable to our friends and family, to be unable to find time for the sunset (or even to know when the sun has set at all), to whiz through our obligations without time for a single, mindful breath, this has become a model of a successful life."