Lonnie Dupre is a Minnesota legend who loves classical music. When I shared with him 'Spiegel im Spiegel,' he was so deeply moved by its meditative force, he said that the piece is joining his collection on his next expedition. Why does Dupre listen to classical music? Because it keeps him focused, calm, centered, brave and empowered  and you need every single one of those feelings if you're planning to travel across the North Pole in summer, or circumnavigate Greenland by kayak, or climb Denali all alone in the darkest time of year. Dupre shares a bit from his latest book, Alone at the Top.