Where Lacan Starts To Go Wrong This is cool but I wonder how much of this is beating on an open door. The mirror stage, qua stage, is for Lacan marked by failure from the beginning - the integration never truly happens, which is why the subject is then further propelled, as it were, into the symbolic, where there is some measure of compensation for the failure of identification at the level of the imaginary. The conditional that Sloterdijk lays out - "If it were genuinely the case that one could always find a self-blinding imaginary element of this type at the bottom of a self, it would at least explain why the subject in a Lacanian universe only finds wellbeing, or at least order, in the symbolic" - is, as far as I can tell, granted by Lacan.
Anthony Wilden puts it well when he notes that the ego that emerges at the level of the imaginary is "an essentially paranoid construct", one that is "founded on the OPPOSITION and IDENTITY between self and other. The ego involves the purely dual, either/or, relationship of master and slave. In a genetic sense, then, the child is born as an undifferentiated 'a-subjective' being. According to Lacan, the child's first discovery is that of DIFFERENCE: the difference between self and world. Through the Imaginary relationship to others, this difference will become an opposition. The child cannot become a subject until he or she can say 'I', but in learning to say 'I', the child will always begin by meaning 'he' or 'she'.
So long as the child lives in the dual Imaginary relationship with the mother (whom Lacan calls the real Other, as opposed to the father, who represents, but who is not, the symbolic Other), the child is trapped in a short-circuit. It is through the oedipus complex, in which each apex of the family triangle comes to mediate the dual relationship between the other two, that the child passes into the 'normality' (one uses the word with reservations) of a three-way, Symbolic relationship, in which opposition is mediated by difference. In the Symbolic, the subject can say 'I': he or she has passed from the subject-object, object-object relationships of the Imaginary into what the phenomenologists would call the INTERSUBJECTIVITY of the Symbolic" (System and Structure, capitals in the original).