The Snow Queen
from Hans Christian Andersen:
"...Then the grinning mirror trembled with such violence that it slipped from their hands and fell to the earth, where it shattered into hundreds of millions of billions of bits, or perhaps even more.
And now it caused more trouble than it did before it was broken, because some of the fragments were smaller than a grain of sand and these went flying throughout the wide world. Once they got in people's eyes they would stay there. These bits of glass distorted everything the people saw, and made them see only the bad side of things, for every little bit of glass kept the same power that the whole mirror had possessed.
A few people even got a glass splinter in their hearts, and that was a terrible thing, for it turned their hearts into lumps of ice..."