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The question of the transition from the personalisation of the superego (that is, from the presence of the object of the identification) to impersonalisation, the classical outcome of the dissolution of the Œdipus complex, arises at various levels of the constitution of the superego and thus of the ego/superego differentiation. Right from the ? phylogenesis ? model up to that of the ? melancholic ? superego, known as the ? pure culture of the death drive ?, the complexity of identifications, both maternal and paternal, brings a necessary relativity to the term. Inter-agency dynamics may attempt to establish an interplay between the various poles and between sexualisation and desexualisation. So-called ? characterological ? disorders reveal certain ambiguities in the ego/superego dynamics. A case example of melancholia without self-reproach but with a radical narcissistic decathexis provides a measure of the kind of impact that certain countertransference reactions can have on the dynamics of the ego/superego differentiation.