The sun had, in the meanwhile, sunk behind the Ettersberg. We felt in the wood the chill of the evening, and drove all the quicker to Wiemar, and to Goethe's house. Goethe urged me to go in with him for a while, and I did so. He was in an extremely engaging mood. He talked a great deal about his theory of colors, and of his obstinate opponents; remarking that he was sure that he had done something in this science.