" One cold winter’s day a number of porcupines huddled together quite closely in order, through their mutual warmth, to prevent themselves from being frozen. But they soon felt the effects of their quills on one another, which made them again move apart. Now, when the need for warmth once again brought them together, the drawback of the quills was repeated so they were tossed between two evils, until they discovered the proper distance from which they could best tolerate one another. Thus the needs for society, which springs from the emptiness and monotony of men’s lives, drives them together but their many unpleasant and repulsive qualities once more drive them apart. "

― Irvin D. Yalom , The Schopenhauer Cure