This chapter discusses how the world the Other lives in is other with respect to mine. What must be assumed is not analogy, but a ‘different normality’ (i.e. hetero-logy)—a norm that is valid within another framework of experience. Understanding another person requires reconstructing her framework of experience. A fortiori, understanding a patient’s symptom requires reconstructing the framework of experience in which it is embedded. Reconstructing the other’s framework of experience needs a preliminary deconstruction. This deconstruction is made through a phenomenological unfolding of the experiential characteristics of the life-world inhabited by the other person. We need to identify, beyond the symptoms that the Other manifests, the fundamental structures of his existence. The experience of time, space, body, self, and others, and their modifications, are indexes of the patient’s basic structures of subjectivity within which each single abnormal experience is situated.