"The adolescent frequently supposes that she is breaking out of the confines of her mundane, schoolgirl existence simply in order to break rules and defy authority. . . . She rids herself of the "oughts" and "musts" that convert every minor infraction into a sin of omission or commission. It certainly does not occur to her or to her family that by questioning the moral standards she erected as a child she is taking the first steps in her journey toward a firmer, more reasonable, less harsh, more ethical form of conscience."