" study by Harvard Business School professor Leslie Perlow. In this study, a group of management consultants were asked to disconnect for a full day each workweek. The consultants were afraid the client would rebel. It turned out that the client didn’t care. As Jung, Grant, and Perlow’s subjects discovered, people will usually respect your right to become inaccessible if these periods are well defined and well advertised, and outside these stretches, you’re once again easy to find. "

― Cal Newport , Deep Work: Rules for Focused Success in a Distracted World