“As anyone who loves poetry will testify, when you learn a good poem, you make a good friend. You have a voice that will pop up in your head, whenever you want it, and say something beautiful and consoling and true. A poem can keep you going when you are driving on a lonely motorway, or when you are trapped on some freezing ledge in the Alps, or when you are engaged in any kind of arduous and repetitive physical activity, and need to keep concentration.”