A Story from Corea called ‘The Magic Mirror’ tells us that a young peasant went from his village to the capital in order to sell his products and to buy some commodities. Passing a shop-window he was struck by having seen somebody in the window who could not have been anybody else but his twin-brother. He was amazed at this because his brother was living in another town. He stood still and gazed, and now he was sure that it was his twin-brother, because when he smiled at him he smiled back. ‘I must have this magic’, he thought. So he entered the shop and asked whether he could buy this strange thing in which was to be seen his counterpart. The shopkeeper wrapped it up and remarked laughingly: ‘Be careful not to crack it, so that your brother will not get lost’. The peasant took it home, but before he could unpack it to show his family he was called away on urgent business.