Lacan attempts to differentiate the Freudian unconscious from other conceptions of the unconscious in his seminar. He argues that the unconscious has a linguistic structure and is characterized by a "gap" or "non-realized" element. The unconscious emerges in everyday life and takes the subject by surprise. Lacan uses the myth of Orpheus and Eurydice to represent the relationship between the analyst and the unconscious, with the unconscious having a tendency to disappear when represented in language.