The sense of moral inferiority always indicates that the missing element is something, which ,to judge by this feeling about it, really ought not to be missing, or which could be made conscious if one took sufficient trouble. The moral inferiority does not come from a collision with the generally accepted and, in a sense, arbitrary moral law, but from the conflict with one's own self which for reasons of psychic equilibrium, demands that the deficit be redressed. Whenever a sense of moral inferiority appears, it indicates not only a need to assimilate an unconscious component, but also the possibility of such an assimilation.
(Jung, CW 7, par 218)