The present paper analyzed the place occupied by psychosis as a structure in relation to neurosis, based on reflections about the mechanisms of denial of the subject in face of reality. Therefore, the text discusses the differences between the significant and the letter in the work of J. Lacan. The use Lacan made of language is compared with the definition of language, according to linguistics. Finally, a reflection is made about the proper name and the place of madness concerning the letter.
Psychoanalysis; Jacques Lacan; structure; psychosis and letter