In the above, I have attempted to study Federn's contribution to schizophrenia in the light of contemporary psychoanalytic thinking. Because his conceptualization is uniquely different from the mainstream of psychoanalytic ideas, I have attempted to begin with giving definition to his ego feeling, ego boundary, ego states, etc. In regard to his views on schizophrenia, I have described them in three categories, that of his on aetiology, that of his on symptom formation, and that of his on treatment. Since his theoretical formulation on symptom formation is so grossly different from that of Freud, I have tried to explain what might be contributory to the so divergent views of the two authors. Lastly, I have indicated how his overall theoretical conceptualization, though inadequate and at times obscure, had foreshadowed many modern conceptualizations.