“We do not allow ourselves the requisite number of hours in which we might – to a critical outside eye – look as if we were doing ‘nothing’: gazing out of the window, following a trail of clouds across the evening sky, lying in a bath, walking around a park or writing down a few notes in a journal. It is precisely during these apparently empty hours of reflection that life’s real work unfolds – hours in which our worst mistakes can be caught, and our best opportunities identified.”