“On a cold winter’s day, a group of porcupines huddled together to stay warm and keep from freezing. But soon they felt one another’s quills and moved apart. When the need for warmth brought them closer together again, their quills again forced them apart. They were driven back and forth at the mercy of their discomforts until they found the distance from one another that provided both a maximum of warmth and a minimum of pain.”
—Arthur Schopenhauer
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