"Whenever a storm with thunder and lightning moved over the sea, he would hurry out to the top of the cliffs as if he had a pact of friendship with the forces of nature, or even went on into the oakwood where the lightning had split a tall tree from top to bottom, which led him to murmur: 'How great, how mighty, how wonderful!' Thus a friend remembered the wanderings of Caspar David Friedrich as a young painter on the Baltic island of Rugen in 1802. It was Friedrich's favorite posture: Homo romanticus out in the weather, saluting the crag."