Among the many reasons that feelings of hate develop in love relationships is the need to find and to exaggerate differences in order to maintain a sense of separateness. Freud's notion of the "narcissism of minor differences" provides a framework within which to understand this need to find disappointing differences in one's beloved. Developmental antecedents of this concern about defining and preserving one's separateness can be identified in both oedipal and preoedipal periods.