Yet still they flew on and on, higher and higher, till at last the mirror trembled so fearfully that it slipped from their hands and fell to the eart… - Hans Christian Andersen

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Yet still they flew on and on, higher and higher, till at last the mirror trembled so fearfully that it slipped from their hands and fell to the earth, shivered into hundreds of millions and billions of bits. And then it did more harm than ever. Some of these bits were not as big as a grain of sand and these flew about, all over the world, getting into people’s eyes. And once in, they stuck there and distorted everything they looked at or made them see everything that was amiss.