"One day cold winter, porcupines a herd shook against each other to protect themselves against cold by heat reciprocal. But, painfully embarrassed by the spines They were soon to depart again from each other. Forced to get closer again because of persistent cold, they felt once again the action of unpleasant pungent, and the alternations of rapprochement and distance lasted until they found a suitable distance where they felt safe from harm. "
According to the parable of Schopenhauer.
