Like the turtle’s shell, the sense of self serves as a shield against stimulation and as a burden which limits mobility into possibly dangerous areas. The turtle rarely has to think about what’s on the other side of his shell; whatever it is, it can’t hurt him, can’t even touch him. So, too, adults insist on the shell of a consistent self for themselves and their children and appreciate turtles for friends; they wish to be protected from being hurt or touched or confused or having to think. If a man can rely on consistency, he can afford not to notice people after the first few times. But I imagined a world in which each individual might be about to play the lover, the benefactor, the sponger, the attacker, the friend: and once known as one of these the next day he might yet be anything. Would we pay attention to this person? Would life be boring? Would life be livable? I saw then clearly for the first time that the fear of failure keeps us huddled in the cave of self – a group of behavior patterns we have mastered and have no intention of risking failure by abandoning.
― Luke Rhinehart, The Dice Man