Thinking improves when parts of the mind are given other tasks, are charged with listening to music or following a line of trees. The music or the view distracts for a time that nervous, censorious, practical part of the mind which is inclined to shut down when it notices something difficult emerging in consciousness and which runs scared of memories, longings, introspective or original ideas and prefers instead the administrative and the impersonal. Of all modes of transport, the train is perhaps the best aid to thought: the views have none of the potential monotony of those
